diff --git a/groups_rules_cli.go b/groups_rules_cli.go
index a7869eb4..fff4a067 100644
--- a/groups_rules_cli.go
+++ b/groups_rules_cli.go
@@ -15,7 +15,8 @@ import (
 const ruleUsage = `usage:
   magpie group rule <group>               the group's rules
   magpie group rule add <group> use=<model> [tokens=<n>] [images] [effort=on|low|medium|high|xhigh|max] [agents=a,b…]
-                        [intent="<what the message asks for>"] [compact] [classifier=<model>] [at=<n>]
+                        [intent="<what the message asks for>"] [compact] [time=HH:MM-HH:MM] [days=mon-fri]
+                        [classifier=<model>] [at=<n>]
                                           a rule: a turn that matches it goes to <model>, one of the group's
                                           (or group/<id>, a group in it), first; a model in the group at an
                                           effort of its own is named with it (use=glm/glm-5.3-flash:high)
@@ -42,11 +43,16 @@ const ruleUsage = `usage:
            OpenCode's, Pi's, Gemini CLI's, Qwen Code's, Kimi's): a cheaper, faster model can write the
            summary. The request is as long as the conversation, so a model known to take less is passed
            over; it is not the turn's model, and the requests after it go on as before
+  time     the turn begins within these hours, on this computer's clock (09:00-18:00; 22:00-08:00
+           runs past midnight) — a provider's peak-price hours sent to another, say
+  days     only on these days (mon-fri, sat,sun); with time, a window past midnight is of the day it
+           begins on. Days alone hold all day
 
   e.g. magpie group rule add opus-anywhere use=openrouter/google/gemini-3-pro tokens=200k
        magpie group rule add opus-anywhere use=a/vision-model images
        magpie group rule add fast use=codex/gpt-5.6-sol:xhigh effort=high
        magpie group rule add opus-anywhere use=deepseek/deepseek-v4-flash compact
+       magpie group rule add cheap use=glm/glm-5.3 time=14:00-18:00 days=mon-fri
        magpie group rule add opus-anywhere use=deepseek/deepseek-v4-flash intent="a quick question" classifier=groq/llama-3.1-8b-instant`
 
 // parseTokens reads 200000, 200k, 1.5m.
diff --git a/internal/gateway/rules.go b/internal/gateway/rules.go
index 7d112ba6..a95bbaa3 100644
--- a/internal/gateway/rules.go
+++ b/internal/gateway/rules.go
@@ -18,6 +18,10 @@ import (
 	"github.com/yetone/magpie/internal/provider"
 )
 
+// ruleClock is the time a turn's rules look at (a rule's hours), and its
+// decision is kept from; tests set it.
+var ruleClock = time.Now
+
 // RuleHit is what the trace tells of a group's rules for a request.
 type RuleHit struct {
 	N    int      `json:"n"`             // the rule, from 1; 0 when none matched
@@ -131,14 +135,14 @@ func ruleFor(key string, g provider.Group, ms []provider.Member, req *Request, a
 		return nil
 	}
 	turn, within := turnIn(req)
-	q := provider.RuleRequest{Tokens: estimate(req), Thinking: req.Thinking, Effort: req.Effort, Agent: agent}
+	now := ruleClock()
+	q := provider.RuleRequest{Tokens: estimate(req), Thinking: req.Thinking, Effort: req.Effort, Agent: agent, At: now}
 	for _, m := range req.Messages {
 		if slices.ContainsFunc(m.Parts, func(p Part) bool { return p.Kind == Image }) {
 			q.Images = true
 			break
 		}
 	}
-	now := time.Now()
 	turnRules.Lock()
 	tr, had := turnRules.m[key]
 	turnRules.Unlock()
diff --git a/internal/gateway/rules_time_test.go b/internal/gateway/rules_time_test.go
new file mode 100644
index 00000000..969c5c73
--- /dev/null
+++ b/internal/gateway/rules_time_test.go
@@ -0,0 +1,64 @@
+package gateway
+
+import (
+	"strings"
+	"testing"
+	"time"
+
+	"github.com/yetone/magpie/internal/provider"
+)
+
+// A rule's hours are looked at as a turn begins, on the clock then: a turn
+// begun inside them goes to its member and stays there for its tool
+// rounds after they end; a turn begun outside them isn't the rule's (where
+// the same conversation goes then is the group's Stays to say).
+func TestRuleTimeWindowAtTurnStart(t *testing.T) {
+	now := time.Date(2026, 9, 29, 10, 0, 0, 0, time.Local) // a Tuesday
+	ruleClock = func() time.Time { return now }
+	t.Cleanup(func() { ruleClock = time.Now })
+	s, a, b := ruled(t, provider.Rule{Use: "b/big", Time: &provider.TimeWindow{From: "09:00", To: "18:00", Days: []string{"mon", "tue", "wed", "thu", "fri"}}})
+	post := func(body string, session string) (string, Route) {
+		t.Helper()
+		code, out := postAs(t, s, session, body)
+		if code != 200 {
+			t.Fatalf("%d %s", code, out)
+		}
+		return out, lastRoute(s)
+	}
+	// turn 1 begins inside the hours: the rule's member, the trace says why
+	out, r := post(chat("hello", nil, 0, ""), "sess")
+	if !strings.Contains(out, "from kb") || r.Rule == nil || r.Rule.N != 1 || r.Rule.Use != "b/big" || strings.Join(r.Rule.When, " · ") != "time 09:00–18:00 Mon–Fri" {
+		t.Fatalf("turn 1: %s %+v", out, r.Rule)
+	}
+	// its tool rounds after the hours end stay where it began
+	now = time.Date(2026, 9, 29, 18, 30, 0, 0, time.Local)
+	out, r = post(chat("hello", nil, 1, ""), "sess")
+	if !strings.Contains(out, "from kb") || !r.Rule.Held || r.Rule.N != 1 {
+		t.Fatalf("turn 1 tool round: %s %+v", out, r.Rule)
+	}
+	// turn 2 begins after them: no rule
+	if _, r = post(chat("hello", []string{"more"}, 0, ""), "sess"); r.Rule.N != 0 || r.Rule.Held {
+		t.Fatalf("turn 2: %+v", r.Rule)
+	}
+	// nor another conversation's: the group's order
+	if out, r = post(chat("hi", nil, 0, ""), "s2"); !strings.Contains(out, "from ka") || r.Rule.N != 0 {
+		t.Fatalf("after hours: %s %+v", out, r.Rule)
+	}
+	// a turn begun before them stays off the rule when they open mid-turn
+	now = time.Date(2026, 9, 30, 8, 59, 0, 0, time.Local)
+	if out, r = post(chat("hello", nil, 0, ""), "s3"); !strings.Contains(out, "from ka") || r.Rule.N != 0 {
+		t.Fatalf("before hours: %s %+v", out, r.Rule)
+	}
+	now = time.Date(2026, 9, 30, 9, 1, 0, 0, time.Local)
+	if out, r = post(chat("hello", nil, 1, ""), "s3"); !strings.Contains(out, "from ka") || !r.Rule.Held || r.Rule.N != 0 {
+		t.Fatalf("before hours, tool round: %s %+v", out, r.Rule)
+	}
+	// on a Saturday, the hours don't hold
+	now = time.Date(2026, 10, 3, 10, 0, 0, 0, time.Local)
+	if out, r = post(chat("hello", nil, 0, ""), "s4"); !strings.Contains(out, "from ka") || r.Rule.N != 0 {
+		t.Fatalf("saturday: %s %+v", out, r.Rule)
+	}
+	if a.n() != 4 || b.n() != 3 {
+		t.Fatalf("a %d b %d", a.n(), b.n())
+	}
+}
diff --git a/internal/gui/assets/i18n.js b/internal/gui/assets/i18n.js
index 77edcad8..f6a50bfc 100644
--- a/internal/gui/assets/i18n.js
+++ b/internal/gui/assets/i18n.js
@@ -1248,6 +1248,26 @@ const I18N = {
     "Time": "时间",
     "has an image": "带图片",
     "compacting": "压缩上下文时",
+    "from": "从",
+    "to": "到",
+    "The turn begins within these hours, on this computer's clock — a provider's peak-price hours sent to another, say": "这一轮在这个时段内开始时（按本机时间）——比如把某家服务商高峰计价的时段转给另一家",
+    "every day": "每天",
+    "days": "星期",
+    "weekdays": "工作日",
+    "weekends": "周末",
+    "Mon": "周一",
+    "Tue": "周二",
+    "Wed": "周三",
+    "Thu": "周四",
+    "Fri": "周五",
+    "Sat": "周六",
+    "Sun": "周日",
+    "{from}–{to}": "{from}–{to}",
+    "all day": "全天",
+    "{hours} {days}": "{days} {hours}",
+    "runs past midnight, into the next day": "跨过午夜，到第二天",
+    "Rule {n}: the hours are two times like 09:00 and 18:00": "第 {n} 条规则：时段要填两个时间，例如 09:00 和 18:00",
+    "Rule {n}: its hours are the whole day — pick days, or other hours": "第 {n} 条规则：这个时段是全天——请选择星期，或换个时段",
     "The agent summarizes the conversation to go on in less room (Claude Code's /compact, Codex, OpenCode…): a cheaper, faster model can do it": "Agent 总结对话以腾出上下文（Claude Code 的 /compact、Codex、OpenCode…）：可交给更便宜、更快的模型来做",
     "longer conversations skip it: it takes {n} tokens": "更长的对话会跳过它：它的上下文只有 {n} tokens",
     "The agent is compacting the conversation, so rule {n} sends the summary to {use}; the conversation stays on the model it was on.": "Agent 正在压缩上下文，规则 {n} 把这次总结交给 {use}；对话本身仍留在原来的模型上。",
diff --git a/internal/gui/assets/routing.css b/internal/gui/assets/routing.css
index 1514cbea..f62a4c2f 100644
--- a/internal/gui/assets/routing.css
+++ b/internal/gui/assets/routing.css
@@ -326,6 +326,11 @@
 .rt-cond.tk { cursor: text; }
 .rt-cond.in { cursor: text; }
 .rt-cond.in input, .editor .rt-cond.in input[type="text"] { width: 24ch; }
+/* a rule's hours: two times in the pill, typed; one that isn't a time is marked */
+.rt-cond.tm { cursor: text; }
+.rt-cond.tm input.clock, .editor .rt-cond.tm input.clock[type="text"] { width: 5.5ch; text-align: center; }
+.rt-cond.tm.bad { border-style: solid; border-color: var(--amber, var(--muted)); }
+.rt-cond[hidden] { display: none; }
 .rt-classifier { display: flex; flex-wrap: wrap; align-items: center; gap: 4px 6px; }
 .rt-classifier[hidden] { display: none; }
 .rt-classifier .w { color: var(--muted); font-size: 12px; }
diff --git a/internal/gui/assets/routing.js b/internal/gui/assets/routing.js
index 01b62a5e..1bb028f8 100644
--- a/internal/gui/assets/routing.js
+++ b/internal/gui/assets/routing.js
@@ -415,8 +415,43 @@
     if (c === "compacting") return t("compacting");
     if ((m = /^effort ≥ (\w+)$/.exec(c))) return t("reasoning ≥ {level}", { level: m[1] });
     if ((m = /^agent (.+)$/.exec(c))) return m[1].split("|").map(agentName).join(" / ");
+    if ((m = /^time (all day|(\d\d:\d\d)–(\d\d:\d\d))(?: (.+))?$/.exec(c))) {
+      // the days as the gateway writes them: Mon–Fri, Sat,Sun, Mon,Wed–Fri
+      const days = [];
+      for (const part of (m[4] || "").split(",").filter(Boolean)) {
+        const [a, b] = part.split("–").map((d) => WEEK.indexOf(d.toLowerCase()));
+        for (let i = a; i >= 0 && i <= (b >= 0 ? b : a); i++) days.push(WEEK[i]);
+      }
+      return timeText({ from: m[2] || "00:00", to: m[3] || "00:00", days });
+    }
     return c;
   }
+  // a rule's hours (provider.TimeWindow): local time, past midnight when
+  // they end before they begin, on the days named or every day
+  const WEEK = ["mon", "tue", "wed", "thu", "fri", "sat", "sun"];
+  const DAY_NAMES = { mon: "Mon", tue: "Tue", wed: "Wed", thu: "Thu", fri: "Fri", sat: "Sat", sun: "Sun" };
+  function daysText(days) {
+    const on = WEEK.map((d) => (days || []).includes(d)), out = [];
+    for (let i = 0; i < 7; i++) {
+      if (!on[i]) continue;
+      let j = i;
+      while (j + 1 < 7 && on[j + 1]) j++;
+      if (j - i >= 2) out.push(t("{from}–{to}", { from: t(DAY_NAMES[WEEK[i]]), to: t(DAY_NAMES[WEEK[j]]) }));
+      else for (let k = i; k <= j; k++) out.push(t(DAY_NAMES[WEEK[k]]));
+      i = j;
+    }
+    return out.length === 7 || !out.length ? "" : out.join(t(", "));
+  }
+  function timeText(w) {
+    const hours = w.from === w.to ? t("all day") : t("{from}–{to}", { from: w.from, to: w.to });
+    const days = daysText(w.days);
+    return days ? t("{hours} {days}", { hours, days }) : hours;
+  }
+  // "9:5" is no time; "9:05" is 09:05
+  const clockOf = (s) => {
+    const m = /^\s*(\d{1,2}):(\d{2})\s*$/.exec(s || "");
+    return m && +m[1] < 24 && +m[2] < 60 ? m[1].padStart(2, "0") + ":" + m[2] : "";
+  };
 
   // how the reasoning a try was sent at came to be
   function effortNote(r, tr) {
@@ -1870,6 +1905,7 @@
     if (r.agents?.length) bits.push(r.agents.map((id) => (state.clients || state.agents || []).find((a) => a.id === id)?.name || id).join(" / "));
     if (r.intent) bits.push(t("asks for “{intent}”", { intent: r.intent }));
     if (r.compact) bits.push(t("compacting"));
+    if (r.time) bits.push(timeText(r.time));
     return bits.join(" · ");
   }
   const slug = (s) => String(s || "").toLowerCase().replace(/[^a-z0-9]+/g, "-").replace(/^-+|-+$/g, "");
@@ -1963,7 +1999,7 @@
     if (!g.ready) tags.append(el("span", "tag bad", t("no member ready")));
     const edit = el("button", "text", t("Edit"));
     edit.onclick = (e) => { e.stopPropagation(); open(); };
-    const open = () => { gEdit = { id: g.id, draft: { name: g.name, members: [...g.members], routing: g.routing || "", pick: g.pick || "", affinity: g.affinity || "", classifier: g.classifier || "", effort: g.effort || "", levels: [...(g.levels || [])], rules: (g.rules || []).map((r) => ({ ...r, intent: r.intent || "", agents: [...(r.agents || [])] })) } }; renderGroups(); };
+    const open = () => { gEdit = { id: g.id, draft: { name: g.name, members: [...g.members], routing: g.routing || "", pick: g.pick || "", affinity: g.affinity || "", classifier: g.classifier || "", effort: g.effort || "", levels: [...(g.levels || [])], rules: (g.rules || []).map((r) => ({ ...r, intent: r.intent || "", agents: [...(r.agents || [])], time: r.time ? { ...r.time, days: [...(r.time.days || [])] } : null })) } }; renderGroups(); };
     row.onclick = open;
     row.append(ics, main, tags, edit);
     return row;
@@ -2173,7 +2209,47 @@
         const cp = el("button", "rt-cond" + (r.compact ? " on" : ""), t("compacting"));
         cp.title = t("The agent summarizes the conversation to go on in less room (Claude Code's /compact, Codex, OpenCode…): a cheaper, faster model can do it");
         cp.onclick = () => { r.compact = !r.compact; cp.classList.toggle("on", r.compact); warn(); };
-        when.append(tk, im, ef, ag, it, cp);
+        // hours of the day, on this computer's clock (a vendor's peak
+        // hours, say): typed as 09:00 and 18:00, past midnight when the
+        // second comes first; the days are picked like the agents
+        const tm = el("span", "rt-cond tm");
+        const tw = () => r.time || (r.time = { from: "", to: "", days: [] });
+        const tFrom = input(r.time?.from || "", "09:00"), tTo = input(r.time?.to || "", "18:00");
+        tm.title = t("The turn begins within these hours, on this computer's clock — a provider's peak-price hours sent to another, say");
+        tm.onclick = (e) => { if (e.target === tm || e.target.tagName === "SPAN") (tFrom.value ? tTo : tFrom).focus({ preventScroll: true }); };
+        const dayBtn = el("button", "rt-cond");
+        const drawTime = () => {
+          const w = r.time, from = clockOf(w?.from), to = clockOf(w?.to);
+          const typed = !!(w && (w.from || w.to));
+          tm.classList.toggle("on", !!(from && to));
+          // a time typed that isn't one, once its field is left
+          tm.classList.toggle("bad", [[tFrom, w?.from], [tTo, w?.to]].some(([b, v]) => v && !clockOf(v) && document.activeElement !== b));
+          dayBtn.hidden = !typed && !w?.days?.length;
+          dayBtn.textContent = daysText(w?.days) || t("every day");
+          dayBtn.classList.toggle("on", !!daysText(w?.days));
+        };
+        for (const [box, key] of [[tFrom, "from"], [tTo, "to"]]) {
+          box.className = "clock";
+          box.maxLength = 5;
+          box.inputMode = "numeric";
+          box.oninput = () => { tw()[key] = box.value.trim(); drawTime(); warn(); };
+          box.onblur = () => { const v = clockOf(box.value); if (v) { box.value = v; tw()[key] = v; } drawTime(); warn(); };
+          box.onkeydown = (e) => e.stopPropagation();
+        }
+        tm.append(el("span", "", t("from")), tFrom, el("span", "", t("to")), tTo);
+        const presets = [["", "every day", []], ["weekdays", "weekdays", WEEK.slice(0, 5)], ["weekends", "weekends", WEEK.slice(5)]];
+        dayBtn.onclick = (ev) => pickFrom("days", dayBtn, ev, [
+          ...presets.map(([v, label, ds]) => ({ value: "=" + v, label: t(label), note: ds.length ? daysText(ds) : t("not a condition") })),
+          ...WEEK.map((d) => ({ value: d, label: t(DAY_NAMES[d]), note: r.time?.days?.includes(d) ? "✓" : "" })),
+        ], (v) => {
+          const w = tw();
+          if (v.startsWith("=")) w.days = [...presets.find(([id]) => "=" + id === v)[2]];
+          else w.days = w.days.includes(v) ? w.days.filter((x) => x !== v) : WEEK.filter((x) => x === v || w.days.includes(x));
+          if (w.days.length === 7) w.days = [];
+          drawTime(); warn();
+        });
+        drawTime();
+        when.append(tk, im, ef, ag, it, cp, tm, dayBtn);
         // the member it sends to
         const use = el("div", "rt-use");
         const ub = el("button", "rt-cond on");
@@ -2188,6 +2264,8 @@
           if (r.tokens && m?.context && m.context < r.tokens) bits.push(t("it takes {n} tokens", { n: m.context.toLocaleString() }));
           // a summary longer than it takes goes by the next rule, or the group
           if (r.compact && m?.context && d.members.some((id) => (infoOf(id)?.context || 0) > m.context)) bits.push(t("longer conversations skip it: it takes {n} tokens", { n: m.context.toLocaleString() }));
+          const from = clockOf(r.time?.from), to = clockOf(r.time?.to);
+          if (from && to && to < from) bits.push(t("runs past midnight, into the next day"));
           hint.textContent = bits.join(" · ");
         };
         warn();
@@ -2202,7 +2280,7 @@
       });
       drawClassifier();
     };
-    rAdd.onclick = () => { d.rules.push({ use: d.members[d.members.length - 1], tokens: 0, images: false, effort: "", agents: [], intent: "", compact: false }); drawRules(); };
+    rAdd.onclick = () => { d.rules.push({ use: d.members[d.members.length - 1], tokens: 0, images: false, effort: "", agents: [], intent: "", compact: false, time: null }); drawRules(); };
     // the classifier, once a rule has an intent or the effort is picked
     // per turn: the model asked which intent a turn's message is and how
     // hard it is. Jev (a decision provider's model) answers both in one
@@ -2314,7 +2392,23 @@
     const save = () => {
       if (!d.members.length) { addBtn.focus({ preventScroll: true }); return status(t("A group needs a model in it"), "warn"); }
       d.rules.forEach((r) => { r.intent = (r.intent || "").trim(); });
-      const bare = d.rules.findIndex((r) => !r.tokens && !r.images && !r.effort && !r.agents.length && !r.intent && !r.compact);
+      // hours: both times, or none and no days; days alone are all day
+      const badTime = d.rules.findIndex((r) => {
+        const w = r.time;
+        if (!w || !w.from && !w.to && !w.days?.length) return r.time = null, false;
+        if (!w.from && !w.to) { w.from = w.to = "00:00"; return false; }
+        const from = clockOf(w.from), to = clockOf(w.to);
+        if (!from || !to) return true;
+        w.from = from; w.to = to;
+        return from === to && !w.days?.length;
+      });
+      if (badTime >= 0) {
+        const w = d.rules[badTime].time;
+        return status(clockOf(w.from) && clockOf(w.from) === clockOf(w.to)
+          ? t("Rule {n}: its hours are the whole day — pick days, or other hours", { n: badTime + 1 })
+          : t("Rule {n}: the hours are two times like 09:00 and 18:00", { n: badTime + 1 }), "warn");
+      }
+      const bare = d.rules.findIndex((r) => !r.tokens && !r.images && !r.effort && !r.agents.length && !r.intent && !r.compact && !r.time);
       if (bare >= 0) return status(t("Rule {n} needs a condition", { n: bare + 1 }), "warn");
       if (d.rules.some((r) => r.intent) && !d.classifier) return status(t("Choose the model that tells which intent a message is"), "warn");
       if (d.effort === "auto" && !d.classifier) return status(t("Choose the model that rates how hard a turn is"), "warn");
diff --git a/internal/gui/tests/README.md b/internal/gui/tests/README.md
index 0ffa64c4..e33911a0 100644
--- a/internal/gui/tests/README.md
+++ b/internal/gui/tests/README.md
@@ -651,10 +651,20 @@ container's own and to set `MAGPIE_PUBLIC_URL`. Outside a container nothing
 changes. No coloured left border; English and Chinese, Chromium and WebKit,
 with `/api/plugins` faked.
 
+`routing-time.test.cjs` checks a routing group's rule for hours of the day
+(Discord: send a provider's peak-price hours, DeepSeek's or GLM's, to
+another). The group's rule and the trace read it as its hours and days
+(22:00–08:00 Mon–Fri; 周一–周五 22:00–08:00); in the editor the hours are two
+times typed into one pill, a click on it types the first and moves nothing,
+past midnight is noted, a time that isn't one is marked once left, the days
+are picked like the agents (weekdays, then Saturday too: Mon–Sat), and the
+rule is saved as `time: {from, to, days}`. English and Chinese, Chromium and
+WebKit, with `/api/plugins` faked.
+
 With Node.js and Playwright available:
 
 ```sh
-node --test internal/gui/tests/menu-scroll.test.cjs internal/gui/tests/click-scroll.test.cjs internal/gui/tests/panel-fold.test.cjs internal/gui/tests/rollup-short.test.cjs internal/gui/tests/panel-routing.test.cjs internal/gui/tests/gateway-fold.test.cjs internal/gui/tests/routing-kind.test.cjs internal/gui/tests/balance-fix.test.cjs internal/gui/tests/cli-update.test.cjs internal/gui/tests/login-import.test.cjs internal/gui/tests/agy-launch.test.cjs internal/gui/tests/currency.test.cjs internal/gui/tests/usage-ledger.test.cjs internal/gui/tests/update-check.test.cjs internal/gui/tests/omarchy.test.cjs internal/gui/tests/brand.test.cjs internal/gui/tests/library-loading.test.cjs node --test internal/gui/tests/signin-callback.test.cjs internal/gui/tests/routing-steady.test.cjs internal/gui/tests/old-webkit.test.cjs internal/gui/tests/session-terminal.test.cjs internal/gui/tests/text-size.test.cjs internal/gui/tests/zcode-site.test.cjs internal/gui/tests/rail-tip.test.cjs internal/gui/tests/sync-update.test.cjs internal/gui/tests/plugin-signin.test.cjs internal/gui/tests/plugin-market.test.cjs internal/gui/tests/s3-sync.test.cjs internal/gui/tests/routing-wb-refused.test.cjs internal/gui/tests/routing-blocked.test.cjs internal/gui/tests/routing-shape.test.cjs internal/gui/tests/market-have.test.cjs internal/gui/tests/sessions-today.test.cjs internal/gui/tests/routing-side-calls.test.cjs internal/gui/tests/import-all-skills.test.cjs internal/gui/tests/routing-flood.test.cjs internal/gui/tests/routing-busy.test.cjs internal/gui/tests/own-skill.test.cjs internal/gui/tests/routing-manual.test.cjs internal/gui/tests/tray-usages.test.cjs internal/gui/tests/provider-remove.test.cjs internal/gui/tests/signin-link.test.cjs internal/gui/tests/tray-inuse.test.cjs internal/gui/tests/codex-auto-reset.test.cjs internal/gui/tests/routing-auto-reset.test.cjs internal/gui/tests/claude-usage-asked.test.cjs internal/gui/tests/claude-risk.test.cjs internal/gui/tests/library-toggle-status.test.cjs internal/gui/tests/library-all.test.cjs internal/gui/tests/routing-reroute-title.test.cjs internal/gui/tests/plain-names.test.cjs internal/gui/tests/panel-effort.test.cjs internal/gui/tests/agent-models-all-hidden.test.cjs internal/gui/tests/omp-roles.test.cjs internal/gui/tests/claude-effort.test.cjs internal/gui/tests/remote-magpie.test.cjs internal/gui/tests/qoder-cn-tile.test.cjs internal/gui/tests/provider-levels-scroll.test.cjs internal/gui/tests/signin-paste-codex.test.cjs internal/gui/tests/usage-alert.test.cjs internal/gui/tests/quota-families.test.cjs internal/gui/tests/provider-search.test.cjs internal/gui/tests/webdav-settings-refresh.test.cjs internal/gui/tests/lan-docker.test.cjs internal/gui/tests/plugin-key-hint.test.cjs internal/gui/tests/update-hide.test.cjs internal/gui/tests/tray-logos.test.cjs internal/gui/tests/routing-proxy.test.cjs internal/gui/tests/sse-body.test.cjs internal/gui/tests/remote-group-served.test.cjs internal/gui/tests/plugin-move-overflow.test.cjs
+node --test internal/gui/tests/menu-scroll.test.cjs internal/gui/tests/click-scroll.test.cjs internal/gui/tests/panel-fold.test.cjs internal/gui/tests/rollup-short.test.cjs internal/gui/tests/panel-routing.test.cjs internal/gui/tests/gateway-fold.test.cjs internal/gui/tests/routing-kind.test.cjs internal/gui/tests/balance-fix.test.cjs internal/gui/tests/cli-update.test.cjs internal/gui/tests/login-import.test.cjs internal/gui/tests/agy-launch.test.cjs internal/gui/tests/currency.test.cjs internal/gui/tests/usage-ledger.test.cjs internal/gui/tests/update-check.test.cjs internal/gui/tests/omarchy.test.cjs internal/gui/tests/brand.test.cjs internal/gui/tests/library-loading.test.cjs node --test internal/gui/tests/signin-callback.test.cjs internal/gui/tests/routing-steady.test.cjs internal/gui/tests/old-webkit.test.cjs internal/gui/tests/session-terminal.test.cjs internal/gui/tests/text-size.test.cjs internal/gui/tests/zcode-site.test.cjs internal/gui/tests/rail-tip.test.cjs internal/gui/tests/sync-update.test.cjs internal/gui/tests/plugin-signin.test.cjs internal/gui/tests/plugin-market.test.cjs internal/gui/tests/s3-sync.test.cjs internal/gui/tests/routing-wb-refused.test.cjs internal/gui/tests/routing-blocked.test.cjs internal/gui/tests/routing-shape.test.cjs internal/gui/tests/market-have.test.cjs internal/gui/tests/sessions-today.test.cjs internal/gui/tests/routing-side-calls.test.cjs internal/gui/tests/import-all-skills.test.cjs internal/gui/tests/routing-flood.test.cjs internal/gui/tests/routing-busy.test.cjs internal/gui/tests/own-skill.test.cjs internal/gui/tests/routing-manual.test.cjs internal/gui/tests/tray-usages.test.cjs internal/gui/tests/provider-remove.test.cjs internal/gui/tests/signin-link.test.cjs internal/gui/tests/tray-inuse.test.cjs internal/gui/tests/codex-auto-reset.test.cjs internal/gui/tests/routing-auto-reset.test.cjs internal/gui/tests/claude-usage-asked.test.cjs internal/gui/tests/claude-risk.test.cjs internal/gui/tests/library-toggle-status.test.cjs internal/gui/tests/library-all.test.cjs internal/gui/tests/routing-reroute-title.test.cjs internal/gui/tests/plain-names.test.cjs internal/gui/tests/panel-effort.test.cjs internal/gui/tests/agent-models-all-hidden.test.cjs internal/gui/tests/omp-roles.test.cjs internal/gui/tests/claude-effort.test.cjs internal/gui/tests/remote-magpie.test.cjs internal/gui/tests/qoder-cn-tile.test.cjs internal/gui/tests/provider-levels-scroll.test.cjs internal/gui/tests/signin-paste-codex.test.cjs internal/gui/tests/usage-alert.test.cjs internal/gui/tests/quota-families.test.cjs internal/gui/tests/provider-search.test.cjs internal/gui/tests/webdav-settings-refresh.test.cjs internal/gui/tests/lan-docker.test.cjs internal/gui/tests/plugin-key-hint.test.cjs internal/gui/tests/update-hide.test.cjs internal/gui/tests/tray-logos.test.cjs internal/gui/tests/routing-proxy.test.cjs internal/gui/tests/sse-body.test.cjs internal/gui/tests/remote-group-served.test.cjs internal/gui/tests/plugin-move-overflow.test.cjs internal/gui/tests/routing-time.test.cjs
 ```
 
 If Playwright is installed outside the repository, set `NODE_PATH` to the
diff --git a/internal/gui/tests/routing-time.test.cjs b/internal/gui/tests/routing-time.test.cjs
new file mode 100644
index 00000000..5481af59
--- /dev/null
+++ b/internal/gui/tests/routing-time.test.cjs
@@ -0,0 +1,164 @@
+// Run with Node's test runner and Playwright on the module path; see README.md.
+// A routing group's rule may hold only at some hours of the day (a Discord
+// user: send a provider's peak-price hours — DeepSeek's, GLM's — to
+// another). A group's rule for them reads as its hours and days; the trace
+// tells the rule that matched by them; in the editor the hours are two
+// times typed into one pill, past midnight noted, the days picked like the
+// agents, a time that isn't one marked, nothing moved by a click, and they
+// are saved as time:{from,to,days}. In English and Chinese.
+const assert = require("node:assert/strict");
+const fs = require("node:fs/promises");
+const path = require("node:path");
+const { test } = require("node:test");
+const { chromium, webkit } = require("playwright");
+
+const assets = path.resolve(__dirname, "../assets");
+const models = [
+  { id: "a/glm", name: "glm", providerName: "A", icon: "generic", context: 200000, ready: true },
+  { id: "b/other", name: "other", providerName: "B", icon: "generic", context: 200000, ready: true },
+];
+const WEEKDAYS = ["mon", "tue", "wed", "thu", "fri"];
+const groups = () => ({
+  models,
+  groups: [{ id: "main", name: "Main", members: ["a/glm", "b/other"], routing: "order", ready: true,
+    memberInfo: [{ id: "a/glm", ready: true, context: 200000 }, { id: "b/other", ready: true, context: 200000 }],
+    rules: [{ use: "b/other", time: { from: "22:00", to: "08:00", days: WEEKDAYS } }] }],
+  pools: [],
+});
+const now = Date.now();
+const route = {
+  id: 7, seq: 7, time: new Date(now - 2000).toISOString(), agent: "claude", model: "main", provider: "b", done: true, status: 200, ms: 900, tokens: 9000,
+  group: { id: "main", name: "Main", members: ["a/glm", "b/other"] },
+  order: [{ id: "b", provider: "b", name: "B", kind: "key", model: "other", known: true }, { id: "a", provider: "a", name: "A", kind: "key", model: "glm", known: true }],
+  tries: [{ id: "b", model: "other", start: new Date(now - 2000).toISOString(), done: true, ms: 800, status: 200 }],
+  rule: { n: 1, use: "b/other", when: ["time 22:00–08:00 Mon–Fri"], turn: 2, tokens: 9000 },
+};
+
+const words = {
+  en: { cond: "22:00–08:00 Mon–Fri", story: "rule 1 matches — 22:00–08:00 Mon–Fri —", night: "runs past midnight, into the next day", every: "every day", weekdays: "weekdays", sat: "Sat", monSat: "Mon–Sat", edit: "Edit", add: "Add a rule", save: "Save" },
+  zh: { cond: "周一–周五 22:00–08:00", story: "规则 1", night: "跨过午夜，到第二天", every: "每天", weekdays: "工作日", sat: "周六", monSat: "周一–周六", edit: "编辑", add: "添加规则", save: "保存" },
+};
+
+function serve(lang, posts) {
+  const state = { agents: [{ id: "claude", name: "Claude Code", path: "/test/claude", fields: [] }], profiles: [], settings: { lang, theme: "light" } };
+  let first = true;
+  return async (r) => {
+    const url = new URL(r.request().url());
+    const json = (data) => r.fulfill({ json: data });
+    if (url.pathname === "/boot.js") return r.fulfill({ contentType: "text/javascript", body: `window.bootPrefs = {lang:"${lang}",theme:"light",web:true};` });
+    if (url.pathname === "/wails/runtime.js") return r.fulfill({ contentType: "text/javascript", body: "export const Window = {};" });
+    if (url.pathname === "/api/state") return json(state);
+    if (url.pathname === "/api/gateway/trace") {
+      if (url.searchParams.get("wait")) return new Promise(() => {}); // nothing more comes
+      const routes = first ? [route] : [];
+      first = false;
+      return json({ mine: true, now: new Date().toISOString(), seq: 7, totals: { requests: 1, rerouted: 0, errors: 0 }, routes });
+    }
+    if (url.pathname === "/api/gateway/history") return json({ cut: false, days: [], routes: [] });
+    if (url.pathname === "/api/plugins") return json({ plugins: [] });
+    if (url.pathname === "/api/groups") return json(groups());
+    if (url.pathname.startsWith("/api/groups/")) {
+      posts.push({ path: url.pathname, body: JSON.parse(r.request().postData() || "{}") });
+      return json(groups());
+    }
+    if (url.pathname === "/api/providers") return json({ providers: [], presets: [], excluded: [], gateway: { running: true, window: true, url: "http://127.0.0.1:3999" } });
+    if (url.pathname.startsWith("/api/")) return json({});
+    const file = path.join(assets, url.pathname === "/" ? "index.html" : url.pathname);
+    const contentType = { ".html": "text/html", ".js": "text/javascript", ".css": "text/css", ".svg": "image/svg+xml", ".png": "image/png" }[path.extname(file)];
+    await r.fulfill({ body: await fs.readFile(file), contentType });
+  };
+}
+
+for (const engine of (process.env.BROWSER ? [process.env.BROWSER] : ["chromium", "webkit"])) {
+  for (const lang of ["en", "zh"]) {
+    const w = words[lang];
+    test(`${engine} ${lang}: a rule for hours of the day`, async (t) => {
+      const browser = await (engine === "webkit" ? webkit.launch() : chromium.launch({ channel: "chromium" }));
+      t.after(() => browser.close());
+      const page = await (await browser.newContext({ viewport: { width: 1100, height: 1400 } })).newPage();
+      page.setDefaultTimeout(5000);
+      const errors = [], posts = [];
+      page.on("pageerror", (e) => errors.push(e.message));
+      await page.route("**/*", serve(lang, posts));
+      await page.goto("http://magpie.test/?view=routing");
+      const group = page.locator(".rt-group").first();
+      await group.waitFor();
+
+      // the trace: the rule that matched, told by its hours
+      await page.waitForFunction((s) => document.documentElement.innerText.includes(s), w.cond);
+      const said = await page.evaluate(() => document.documentElement.innerText);
+      assert(said.includes(w.story), `the rule that matched is told: ${said.slice(0, 400)}`);
+
+      // the group's rule, in words
+      const title = await group.evaluate((g) => [...g.querySelectorAll("[title]")].map((e) => e.title).join("\n"));
+      assert(title.includes(`1. ${w.cond} →`), `the rule reads as its hours: ${title}`);
+
+      // the editor: the hours in their pill, the days on theirs, past midnight noted
+      await group.locator("button", { hasText: w.edit }).click();
+      const ed = page.locator(".rt-gedit");
+      const rows = ed.locator(".rt-rule");
+      await rows.first().waitFor();
+      const tm1 = rows.first().locator(".rt-cond.tm");
+      assert.equal(await tm1.getAttribute("class"), "rt-cond tm on");
+      assert.deepEqual(await tm1.locator("input").evaluateAll((xs) => xs.map((x) => x.value)), ["22:00", "08:00"]);
+      const days1 = rows.first().locator("button.rt-cond", { hasText: lang === "en" ? "Mon–Fri" : "周一–周五" });
+      assert.equal(await days1.getAttribute("class"), "rt-cond on");
+      assert.equal(await rows.first().locator(".rt-rwarn").textContent(), w.night);
+
+      // a second rule: its hours typed, nothing moved by a click
+      await ed.locator("button", { hasText: w.add }).click();
+      const row2 = rows.nth(1);
+      const tm2 = row2.locator(".rt-cond.tm");
+      await tm2.waitFor();
+      const dayBtn2 = row2.locator("button.rt-cond", { hasText: w.every });
+      assert.equal(await dayBtn2.isVisible(), false, "no days until hours are typed");
+      const at = () => page.evaluate(() => [...document.querySelectorAll("*")].filter((e) => e.scrollTop).map((e) => [e.id || e.className, e.scrollTop]).join(";") + "|" + Math.round(document.querySelector(".rt-gedit").getBoundingClientRect().top));
+      await tm2.scrollIntoViewIfNeeded(); // by the test, as the reader would
+      await page.waitForTimeout(200);
+      const before = await at();
+      const label = tm2.locator("span").first();
+      await label.click();
+      assert.equal(await at(), before, "the click moved nothing");
+      const [from2, to2] = [tm2.locator("input").nth(0), tm2.locator("input").nth(1)];
+      assert.equal(await from2.evaluate((x) => x === document.activeElement), true, "a click on the pill types its first time");
+      await page.keyboard.type("25:00");
+      await to2.click();
+      assert.match(await tm2.getAttribute("class"), /\bbad\b/, "a time that isn't one is marked once left");
+      assert.equal(await at(), before, "the click moved nothing");
+      await from2.fill("9:00");
+      await to2.fill("18:00");
+      await to2.blur();
+      assert.equal(await from2.inputValue(), "09:00");
+      assert.equal(await tm2.getAttribute("class"), "rt-cond tm on");
+      assert.equal(await row2.locator(".rt-rwarn").textContent(), "");
+
+      // the days: weekdays, and Saturday too
+      await dayBtn2.waitFor();
+      await dayBtn2.click();
+      assert.equal(await at(), before, "the click moved nothing");
+      await page.locator("#list li").filter({ hasText: w.weekdays }).first().click();
+      const days2 = row2.locator(".when > button.rt-cond").last();
+      assert.equal(await days2.textContent(), lang === "en" ? "Mon–Fri" : "周一–周五");
+      await days2.click();
+      await page.locator("#list li").filter({ hasText: w.sat }).last().click(); // the day's own, after weekends
+      assert.equal(await days2.textContent(), w.monSat);
+      assert.equal(await days2.getAttribute("class"), "rt-cond on");
+
+      // saved: time:{from,to,days}, neither rule refused as having no condition
+      const saveBtn = ed.locator("button.primary", { hasText: w.save });
+      await page.mouse.move(550, 600);
+      await page.mouse.wheel(0, 600);
+      await page.waitForTimeout(300);
+      const sb = await saveBtn.boundingBox();
+      await page.mouse.click(sb.x + sb.width / 2, sb.y + sb.height / 2);
+      await page.waitForFunction(() => !document.querySelector(".rt-gedit"));
+      const save = posts.find((p) => p.path === "/api/groups/save");
+      assert(save, `saved: ${JSON.stringify(posts)}`);
+      assert.deepEqual(save.body.rules.map((r) => [r.use, r.time]), [
+        ["b/other", { from: "22:00", to: "08:00", days: WEEKDAYS }],
+        ["b/other", { from: "09:00", to: "18:00", days: [...WEEKDAYS, "sat"] }],
+      ]);
+      assert.deepEqual(errors, []);
+    });
+  }
+}
diff --git a/internal/provider/grouprule.go b/internal/provider/grouprule.go
index 3fa57e7d..f22d3845 100644
--- a/internal/provider/grouprule.go
+++ b/internal/provider/grouprule.go
@@ -4,7 +4,8 @@ package provider
 // seen in the request itself — how long it is, whether it carries an
 // image, how hard the agent asked the model to think, which agent sent it.
 // Those are never guessed: the same request is always routed the same way,
-// and the trace tells which rule did it. The one exception is a rule with
+// and the trace tells which rule did it. A rule may also hold only at some
+// hours of the day (a vendor's peak-price hours, say), on magpie's clock. The one exception is a rule with
 // an intent (what the user asks for, in the user's words): as a turn
 // begins, a model the group names (its Classifier) is asked which of the
 // intents the user's message is, once, and the trace tells what it said.
@@ -18,7 +19,9 @@ package provider
 import (
 	"fmt"
 	"slices"
+	"strconv"
 	"strings"
+	"time"
 )
 
 // Efforts are the reasoning levels a rule can ask for, lowest first.
@@ -48,6 +51,151 @@ type Rule struct {
 	// Codex's, OpenCode's, Pi's…) — which a cheaper, faster model can do
 	// in place of the one the conversation is on.
 	Compact bool `json:"compact,omitempty"`
+	// Time: the turn begins within these hours of the day, local time — a
+	// vendor's peak-price hours sent to another, say.
+	Time *TimeWindow `json:"time,omitempty"`
+}
+
+// TimeWindow is hours of the day, local time: From until To, "HH:MM" each,
+// past midnight when To comes before From (22:00–08:00), the whole day
+// when they are the same. Days, when set, are the days it holds on ("mon"
+// … "sun"); a window past midnight is of the day it begins on, so Friday's
+// 22:00–08:00 takes Saturday's early hours too.
+type TimeWindow struct {
+	From string   `json:"from"`
+	To   string   `json:"to"`
+	Days []string `json:"days,omitempty"`
+}
+
+// Weekdays are the days a TimeWindow names, as time.Weekday counts them.
+var Weekdays = []string{"sun", "mon", "tue", "wed", "thu", "fri", "sat"}
+
+// dayOrder is the week as a window shows it, Monday first.
+var dayOrder = []string{"mon", "tue", "wed", "thu", "fri", "sat", "sun"}
+
+// clockMinutes reads "HH:MM" (or "H:MM") as minutes past midnight.
+func clockMinutes(s string) (int, bool) {
+	h, m, ok := strings.Cut(strings.TrimSpace(s), ":")
+	if !ok || len(h) < 1 || len(h) > 2 || len(m) != 2 {
+		return 0, false
+	}
+	hh, err1 := strconv.Atoi(h)
+	mm, err2 := strconv.Atoi(m)
+	if err1 != nil || err2 != nil || hh < 0 || hh > 23 || mm < 0 || mm > 59 || h[0] == '+' || m[0] == '+' {
+		return 0, false
+	}
+	return hh*60 + mm, true
+}
+
+// ParseDay reads a day of the week, "mon" or "Monday", as Weekdays has it.
+func ParseDay(s string) (string, bool) {
+	s = strings.ToLower(strings.TrimSpace(s))
+	if len(s) < 3 {
+		return "", false
+	}
+	for i, d := range Weekdays {
+		if strings.HasPrefix(strings.ToLower(time.Weekday(i).String()), s) {
+			return d, true
+		}
+	}
+	return "", false
+}
+
+// clean checks a window and puts it the one way: "09:00", days known,
+// each once in the week's order, none when it is every day.
+func (w *TimeWindow) clean() error {
+	from, ok := clockMinutes(w.From)
+	if !ok {
+		return fmt.Errorf("the time %q is not HH:MM (09:00)", w.From)
+	}
+	to, ok := clockMinutes(w.To)
+	if !ok {
+		return fmt.Errorf("the time %q is not HH:MM (18:00)", w.To)
+	}
+	w.From, w.To = fmt.Sprintf("%02d:%02d", from/60, from%60), fmt.Sprintf("%02d:%02d", to/60, to%60)
+	var days []string
+	for _, d := range w.Days {
+		v, ok := ParseDay(d)
+		if !ok {
+			return fmt.Errorf("%q is not a day of the week (mon … sun)", d)
+		}
+		days = append(days, v)
+	}
+	w.Days = nil
+	for _, d := range dayOrder {
+		if slices.Contains(days, d) {
+			w.Days = append(w.Days, d)
+		}
+	}
+	if len(w.Days) == len(dayOrder) {
+		w.Days = nil
+	}
+	return nil
+}
+
+// Holds reports whether at is within the window, on the machine's clock.
+func (w TimeWindow) Holds(at time.Time) bool {
+	from, ok1 := clockMinutes(w.From)
+	to, ok2 := clockMinutes(w.To)
+	if at.IsZero() || !ok1 || !ok2 {
+		return false
+	}
+	at = at.Local()
+	m, day := at.Hour()*60+at.Minute(), at.Weekday()
+	switch {
+	case from == to: // the whole day
+	case from < to:
+		if m < from || m >= to {
+			return false
+		}
+	default: // past midnight
+		if m >= to && m < from {
+			return false
+		}
+		if m < to {
+			day = (day + 6) % 7 // the window began the day before
+		}
+	}
+	return len(w.Days) == 0 || slices.Contains(w.Days, Weekdays[day])
+}
+
+// DaysText is the window's days for a list: "Mon–Fri", "Sat,Sun",
+// "Mon,Wed–Fri"; "" for every day.
+func (w TimeWindow) DaysText() string {
+	name := func(d string) string { return strings.ToUpper(d[:1]) + d[1:] }
+	var out []string
+	for i := 0; i < len(dayOrder); {
+		if !slices.Contains(w.Days, dayOrder[i]) {
+			i++
+			continue
+		}
+		j := i
+		for j+1 < len(dayOrder) && slices.Contains(w.Days, dayOrder[j+1]) {
+			j++
+		}
+		switch j - i {
+		case 0:
+			out = append(out, name(dayOrder[i]))
+		case 1:
+			out = append(out, name(dayOrder[i]), name(dayOrder[j]))
+		default:
+			out = append(out, name(dayOrder[i])+"–"+name(dayOrder[j]))
+		}
+		i = j + 1
+	}
+	return strings.Join(out, ",")
+}
+
+// Text is the window as a rule's conditions show it: "09:00–18:00 Mon–Fri".
+func (w TimeWindow) Text() string {
+	s := w.From + "–" + w.To
+	if w.From == w.To {
+		s = "all day"
+	}
+	if d := w.DaysText(); d != "" {
+		s += " " + d
+	}
+	return s
 }
 
 // MaxIntent is how long an intent may be, in characters.
@@ -78,6 +226,9 @@ func (r Rule) Conditions() []string {
 	if r.Compact {
 		out = append(out, "compacting")
 	}
+	if r.Time != nil {
+		out = append(out, "time "+r.Time.Text())
+	}
 	return out
 }
 
@@ -92,6 +243,16 @@ func cleanRules(rules []Rule, members []string) ([]Rule, error) {
 			r.Agents[j] = strings.ToLower(r.Agents[j])
 		}
 		n := i + 1
+		if r.Time != nil {
+			w := *r.Time
+			if err := w.clean(); err != nil {
+				return nil, fmt.Errorf("rule %d: %w", n, err)
+			}
+			if w.From == w.To && len(w.Days) == 0 {
+				return nil, fmt.Errorf("rule %d: its hours are the whole day, every day: give days or other hours", n)
+			}
+			r.Time = &w
+		}
 		switch {
 		case r.Use == "":
 			return nil, fmt.Errorf("rule %d: which model it sends to is missing", n)
@@ -104,7 +265,7 @@ func cleanRules(rules []Rule, members []string) ([]Rule, error) {
 		case len([]rune(r.Intent)) > MaxIntent:
 			return nil, fmt.Errorf("rule %d: an intent is at most %d characters", n, MaxIntent)
 		case len(r.Conditions()) == 0:
-			return nil, fmt.Errorf("rule %d: it needs a condition (tokens, images, effort, agents, intent or compacting)", n)
+			return nil, fmt.Errorf("rule %d: it needs a condition (tokens, images, effort, agents, intent, compacting or time)", n)
 		}
 		if len(r.Agents) == 0 {
 			r.Agents = nil
@@ -126,6 +287,9 @@ type RuleRequest struct {
 	Intent string
 	// Compact: the request is the agent compacting its conversation.
 	Compact bool
+	// At is when the request came, for a rule's hours; a zero time is in
+	// none.
+	At time.Time
 }
 
 // Matches reports whether the request is one the rule is for.
@@ -148,6 +312,9 @@ func (r Rule) MatchesBesidesIntent(q RuleRequest) bool {
 	if r.Compact && !q.Compact {
 		return false
 	}
+	if r.Time != nil && !r.Time.Holds(q.At) {
+		return false
+	}
 	switch r.Effort {
 	case "":
 	case "on":
@@ -244,11 +411,11 @@ func ruledEntry(e *Entry, g Group, ms []Member, entries []Entry) {
 		if !ok {
 			continue
 		}
-		if r.Images && r.Tokens == 0 && r.Effort == "" && len(r.Agents) == 0 && r.Intent == "" && !r.Compact && sees(x) && !e.Images &&
+		if r.Images && r.Tokens == 0 && r.Effort == "" && len(r.Agents) == 0 && r.Intent == "" && !r.Compact && r.Time == nil && sees(x) && !e.Images &&
 			!slices.ContainsFunc(g.Rules[:i], func(b Rule) bool { y, ok := of(b.Use); return !ok || !sees(y) }) {
 			e.Images, e.ImageInput = true, x.ImageInput
 		}
-		if r.Tokens == 0 || r.Images || r.Effort != "" || len(r.Agents) > 0 || r.Intent != "" || r.Compact || x.Context <= e.Context {
+		if r.Tokens == 0 || r.Images || r.Effort != "" || len(r.Agents) > 0 || r.Intent != "" || r.Compact || r.Time != nil || x.Context <= e.Context {
 			continue // only a rule of length alone takes every long request
 		}
 		// every request up to the rule's length must fit whoever may get
diff --git a/internal/provider/grouprule_time_test.go b/internal/provider/grouprule_time_test.go
new file mode 100644
index 00000000..5c20d9d0
--- /dev/null
+++ b/internal/provider/grouprule_time_test.go
@@ -0,0 +1,151 @@
+package provider
+
+import (
+	"encoding/json"
+	"strings"
+	"testing"
+	"time"
+)
+
+// at is a local time on the week of Monday 2026-09-28.
+func at(day, hour, min int) time.Time {
+	return time.Date(2026, 9, 27+day, hour, min, 0, 0, time.Local) // day 0 is Sunday
+}
+
+// A rule's hours hold on the machine's clock, past midnight when they end
+// before they begin, and on the day they begin on.
+func TestRuleTimeWindow(t *testing.T) {
+	day := TimeWindow{From: "09:00", To: "18:00", Days: []string{"mon", "tue", "wed", "thu", "fri"}}
+	night := TimeWindow{From: "22:00", To: "08:00", Days: []string{"fri"}}
+	whole := TimeWindow{From: "00:00", To: "00:00", Days: []string{"sat", "sun"}}
+	for _, c := range []struct {
+		w    TimeWindow
+		at   time.Time
+		want bool
+	}{
+		{day, at(1, 9, 0), true},    // Monday, as it opens
+		{day, at(1, 17, 59), true},  // Monday, before it ends
+		{day, at(1, 18, 0), false},  // as it ends
+		{day, at(1, 8, 59), false},  // before
+		{day, at(6, 12, 0), false},  // Saturday
+		{night, at(5, 23, 0), true}, // Friday night
+		{night, at(6, 3, 0), true},  // Saturday's early hours: Friday's window
+		{night, at(6, 8, 0), false}, // as it ends
+		{night, at(5, 3, 0), false}, // Friday's early hours: Thursday's window
+		{night, at(6, 23, 0), false},
+		{whole, at(0, 0, 0), true},
+		{whole, at(6, 23, 59), true},
+		{whole, at(1, 12, 0), false},
+		{TimeWindow{From: "22:00", To: "08:00"}, at(3, 7, 0), true},
+		{TimeWindow{From: "22:00", To: "08:00"}, at(3, 12, 0), false},
+		{day, time.Time{}, false}, // no time is in no hours
+	} {
+		if got := c.w.Holds(c.at); got != c.want {
+			t.Errorf("%s at %s: %v, want %v", c.w.Text(), c.at.Format("Mon 15:04"), got, c.want)
+		}
+	}
+}
+
+func TestRuleTimeCleanAndConditions(t *testing.T) {
+	rules, err := cleanRules([]Rule{
+		{Use: "a/x", Time: &TimeWindow{From: "9:00", To: "18:00", Days: []string{"Friday", "mon", "tue", "wed", "thu", "mon"}}},
+		{Use: "a/x", Time: &TimeWindow{From: "22:00", To: "08:00"}},
+		{Use: "a/x", Time: &TimeWindow{From: "00:00", To: "00:00", Days: []string{"sun", "sat"}}},
+		{Use: "a/x", Time: &TimeWindow{From: "08:00", To: "12:00", Days: []string{"mon", "tue", "wed", "thu", "fri", "sat", "sun"}}},
+		{Use: "a/x", Tokens: 100, Time: &TimeWindow{From: "08:00", To: "12:00", Days: []string{"mon", "wed", "thu", "fri"}}},
+	}, []string{"a/x"})
+	if err != nil {
+		t.Fatal(err)
+	}
+	want := []string{"time 09:00–18:00 Mon–Fri", "time 22:00–08:00", "time all day Sat,Sun", "time 08:00–12:00", "tokens ≥ 100 · time 08:00–12:00 Mon,Wed–Fri"}
+	for i, r := range rules {
+		if got := strings.Join(r.Conditions(), " · "); got != want[i] {
+			t.Errorf("rule %d: %q, want %q", i+1, got, want[i])
+		}
+	}
+	if d := rules[0].Time.Days; strings.Join(d, ",") != "mon,tue,wed,thu,fri" || rules[0].Time.From != "09:00" {
+		t.Errorf("cleaned: %+v", rules[0].Time)
+	}
+	if rules[3].Time.Days != nil {
+		t.Errorf("every day is no days: %+v", rules[3].Time)
+	}
+	for _, bad := range []TimeWindow{
+		{From: "25:00", To: "08:00"},
+		{From: "09:00", To: "8"},
+		{From: "", To: "08:00"},
+		{From: "09:60", To: "10:00"},
+		{From: "09:00", To: "18:00", Days: []string{"funday"}},
+		{From: "10:00", To: "10:00"}, // the whole day, every day: no condition
+	} {
+		if _, err := cleanRules([]Rule{{Use: "a/x", Time: &bad}}, []string{"a/x"}); err == nil {
+			t.Errorf("%+v: no error", bad)
+		}
+	}
+}
+
+// A rule with hours matches a request inside them only; one without a
+// time (an older magpie's) is in none.
+func TestRuleTimeMatches(t *testing.T) {
+	r := Rule{Use: "a/x", Time: &TimeWindow{From: "09:00", To: "18:00", Days: []string{"mon", "tue", "wed", "thu", "fri"}}}
+	if !r.Matches(RuleRequest{At: at(2, 10, 0)}) {
+		t.Error("inside the hours: no match")
+	}
+	if r.Matches(RuleRequest{At: at(2, 19, 0)}) || r.Matches(RuleRequest{At: at(0, 10, 0)}) || r.Matches(RuleRequest{}) {
+		t.Error("outside the hours: a match")
+	}
+	if i := MatchRule([]Rule{r, {Use: "a/y", Tokens: 10}}, RuleRequest{Tokens: 20, At: at(2, 20, 0)}); i != 1 {
+		t.Errorf("after hours: rule %d", i)
+	}
+}
+
+// Stored with omitempty: a rule without hours is written as before, and a
+// window round-trips.
+func TestRuleTimeJSON(t *testing.T) {
+	b, _ := json.Marshal(Rule{Use: "a/x", Tokens: 5})
+	if strings.Contains(string(b), "time") {
+		t.Errorf("no hours written: %s", b)
+	}
+	b, _ = json.Marshal(Rule{Use: "a/x", Time: &TimeWindow{From: "22:00", To: "08:00"}})
+	if string(b) != `{"use":"a/x","time":{"from":"22:00","to":"08:00"}}` {
+		t.Errorf("%s", b)
+	}
+	var r Rule
+	if err := json.Unmarshal(b, &r); err != nil || r.Time == nil || r.Time.From != "22:00" {
+		t.Errorf("%v %+v", err, r)
+	}
+}
+
+// Typed: time=… days=… — read back the same.
+func TestParseRuleTime(t *testing.T) {
+	g := Group{ID: "g", Members: []string{"a/x", "b/y"}}
+	for _, c := range []struct{ line, want, cond string }{
+		{"use=b/y time=09:00-18:00 days=mon-fri", "use=b/y time=09:00-18:00 days=mon-fri", "time 09:00–18:00 Mon–Fri"},
+		{"use=b/y days=sat,sun", "use=b/y days=sat,sun", "time all day Sat,Sun"},
+		{"use=b/y days=fri-mon time=22:00–08:00", "use=b/y time=22:00-08:00 days=mon,fri-sun", "time 22:00–08:00 Mon,Fri–Sun"},
+		{"use=b/y time=22:00-08:00", "use=b/y time=22:00-08:00", "time 22:00–08:00"},
+	} {
+		r, _, _, err := ParseRule(g, RuleWords(c.line))
+		if err != nil {
+			t.Fatalf("%s: %v", c.line, err)
+		}
+		rs, err := cleanRules([]Rule{r}, g.Members)
+		if err != nil {
+			t.Fatalf("%s: %v", c.line, err)
+		}
+		if got := rs[0].Line(); got != c.want {
+			t.Errorf("%s: line %q, want %q", c.line, got, c.want)
+		}
+		if got := strings.Join(rs[0].Conditions(), " · "); got != c.cond {
+			t.Errorf("%s: %q, want %q", c.line, got, c.cond)
+		}
+		again, _, _, err := ParseRule(g, RuleWords(rs[0].Line()))
+		if err != nil || again.Time == nil || again.Time.From != rs[0].Time.From || again.Time.To != rs[0].Time.To {
+			t.Errorf("%s: read back %v %+v", c.line, err, again.Time)
+		}
+	}
+	for _, bad := range []string{"use=b/y time=9-18", "use=b/y time=09:00", "use=b/y days=someday", "use=b/y days="} {
+		if _, _, _, err := ParseRule(g, RuleWords(bad)); err == nil {
+			t.Errorf("%s: no error", bad)
+		}
+	}
+}
diff --git a/internal/provider/ruleparse.go b/internal/provider/ruleparse.go
index 663200de..1c7c5f13 100644
--- a/internal/provider/ruleparse.go
+++ b/internal/provider/ruleparse.go
@@ -1,10 +1,12 @@
 package provider
 
 // A rule as it is typed: use=<model> tokens=200k images effort=high
-// agents=a,b intent="…" compact — by magpie group rule and the TUI's routing page.
+// agents=a,b intent="…" compact time=09:00-18:00 days=mon-fri — by magpie
+// group rule and the TUI's routing page.
 
 import (
 	"fmt"
+	"slices"
 	"strconv"
 	"strings"
 )
@@ -26,6 +28,50 @@ func ParseTokens(v string) (int, error) {
 	return int(f * mul), nil
 }
 
+// ParseDays reads days of the week: "mon-fri", "sat,sun", "mon,wed-fri";
+// a range may run past Sunday (fri-mon).
+func ParseDays(v string) ([]string, error) {
+	var out []string
+	for _, part := range strings.FieldsFunc(v, func(r rune) bool { return r == ',' || r == ' ' }) {
+		a, b, isRange := strings.Cut(strings.ReplaceAll(part, "–", "-"), "-")
+		from, ok := ParseDay(a)
+		if !ok {
+			return nil, fmt.Errorf("days: %q is not a day of the week (mon … sun)", a)
+		}
+		to := from
+		if isRange {
+			if to, ok = ParseDay(b); !ok {
+				return nil, fmt.Errorf("days: %q is not a day of the week (mon … sun)", b)
+			}
+		}
+		for i := slices.Index(Weekdays, from); ; i = (i + 1) % 7 {
+			if !slices.Contains(out, Weekdays[i]) {
+				out = append(out, Weekdays[i])
+			}
+			if Weekdays[i] == to {
+				break
+			}
+		}
+	}
+	if len(out) == 0 {
+		return nil, fmt.Errorf("days names the days of the week it holds on: days=mon-fri")
+	}
+	return out, nil
+}
+
+// ParseTimeWindow reads hours of the day: 09:00-18:00, 22:00-08:00.
+func ParseTimeWindow(v string) (*TimeWindow, error) {
+	from, to, ok := strings.Cut(strings.ReplaceAll(strings.TrimSpace(v), "–", "-"), "-")
+	if !ok {
+		return nil, fmt.Errorf("time is hours of the day, local time: time=09:00-18:00 (or 22:00-08:00, past midnight), not %q", v)
+	}
+	w := &TimeWindow{From: strings.TrimSpace(from), To: strings.TrimSpace(to)}
+	if err := w.clean(); err != nil {
+		return nil, err
+	}
+	return w, nil
+}
+
 // UnknownRuleWord starts the error for a word ParseRule doesn't know.
 const UnknownRuleWord = "unknown "
 
@@ -79,6 +125,24 @@ func ParseRule(g Group, words []string) (r Rule, at int, classifier string, err
 			if r.Intent == "" {
 				return r, 0, "", fmt.Errorf(`intent says what the message asks for: intent="writing or fixing tests"`)
 			}
+		case "time", "hours", "between":
+			w, err := ParseTimeWindow(v)
+			if err != nil {
+				return r, 0, "", err
+			}
+			if r.Time != nil {
+				w.Days = r.Time.Days
+			}
+			r.Time = w
+		case "days", "day":
+			days, err := ParseDays(v)
+			if err != nil {
+				return r, 0, "", err
+			}
+			if r.Time == nil {
+				r.Time = &TimeWindow{From: "00:00", To: "00:00"} // the whole day, unless time= says
+			}
+			r.Time.Days = days
 		case "classifier", "classify", "by":
 			if classifier = strings.TrimSpace(v); classifier == "" {
 				return r, 0, "", fmt.Errorf("classifier=<model>: the model that tells which intent a message is")
@@ -90,7 +154,7 @@ func ParseRule(g Group, words []string) (r Rule, at int, classifier string, err
 			}
 			at = n
 		default:
-			return r, 0, "", fmt.Errorf(UnknownRuleWord+"%q (use, tokens, images, effort, agents, intent, compact, classifier, at)", w)
+			return r, 0, "", fmt.Errorf(UnknownRuleWord+"%q (use, tokens, images, effort, agents, intent, compact, time, days, classifier, at)", w)
 		}
 	}
 	if r.Use == "" {
@@ -183,5 +247,13 @@ func (r Rule) Line() string {
 	if r.Compact {
 		out = append(out, "compact")
 	}
+	if r.Time != nil {
+		if r.Time.From != r.Time.To || len(r.Time.Days) == 0 {
+			out = append(out, "time="+r.Time.From+"-"+r.Time.To)
+		}
+		if len(r.Time.Days) > 0 {
+			out = append(out, "days="+strings.ReplaceAll(strings.ToLower(r.Time.DaysText()), "–", "-"))
+		}
+	}
 	return strings.Join(out, " ")
 }
diff --git a/internal/tui/routing.go b/internal/tui/routing.go
index ded40a36..b6ad4c51 100644
--- a/internal/tui/routing.go
+++ b/internal/tui/routing.go
@@ -263,7 +263,8 @@ func (m *model) openClassifier(g provider.Group) {
 
 // ruleHint is what a rule is typed as.
 const ruleHint = `use=<model>, and any of: tokens=200k · images · effort=on|low|medium|high|xhigh|max · agents=codex,claude
-intent="a quick question" (the group's classifier=<model> tells it) · compact · at=<n> for its place`
+intent="a quick question" (the group's classifier=<model> tells it) · compact
+time=09:00-18:00 (local; 22:00-08:00 runs past midnight) · days=mon-fri · at=<n> for its place`
 
 // openRule asks for a rule: a new one, or rule i (from 0) typed again.
 func (m *model) openRule(g provider.Group, i int) {