diff --git a/extensions/qqbot/src/engine/tools/remind-logic.test.ts b/extensions/qqbot/src/engine/tools/remind-logic.test.ts
index aa7f10f8ae1..a870f740569 100644
--- a/extensions/qqbot/src/engine/tools/remind-logic.test.ts
+++ b/extensions/qqbot/src/engine/tools/remind-logic.test.ts
@@ -1,4 +1,4 @@
-import { describe, expect, it } from "vitest";
+import { afterEach, describe, expect, it, vi } from "vitest";
 import {
   parseRelativeTime,
   isCronExpression,
@@ -12,6 +12,10 @@ import {
 } from "./remind-logic.js";
 
 describe("engine/tools/remind-logic", () => {
+  afterEach(() => {
+    vi.useRealTimers();
+  });
+
   describe("parseRelativeTime", () => {
     it("parses minutes shorthand", () => {
       expect(parseRelativeTime("5m")).toBe(5 * 60_000);
@@ -299,5 +303,20 @@ describe("engine/tools/remind-logic", () => {
         action: "remove",
       });
     });
+
+    it("rejects relative reminders whose scheduled time exceeds the Date range", () => {
+      vi.useFakeTimers();
+      vi.setSystemTime(new Date(8_640_000_000_000_000));
+
+      const plan = prepareRemindCronAction(
+        { action: "add", content: "test reminder", to: "qqbot:c2c:123", time: "5m" },
+        {},
+      );
+
+      expect(plan).toEqual({
+        ok: false,
+        error: "Reminder time is outside the supported Date range",
+      });
+    });
   });
 });
diff --git a/extensions/qqbot/src/engine/tools/remind-logic.ts b/extensions/qqbot/src/engine/tools/remind-logic.ts
index 701483d1d19..bdc79f68812 100644
--- a/extensions/qqbot/src/engine/tools/remind-logic.ts
+++ b/extensions/qqbot/src/engine/tools/remind-logic.ts
@@ -1,3 +1,5 @@
+import { resolveExpiresAtMsFromDurationMs } from "openclaw/plugin-sdk/number-runtime";
+
 /**
  * QQBot reminder tool core logic.
  * QQBot 提醒工具核心逻辑。
@@ -186,8 +188,7 @@ export function buildReminderPrompt(content: string): string {
 }
 
 /** Build cron job params for a one-shot delayed reminder. */
-function buildOnceJob(params: RemindParams, delayMs: number, to: string, accountId: string) {
-  const atMs = Date.now() + delayMs;
+function buildOnceJob(params: RemindParams, atMs: number, to: string, accountId: string) {
   const content = params.content!;
   const name = params.name || generateJobName(content);
   return {
@@ -322,11 +323,15 @@ export function prepareRemindCronAction(
   if (delayMs < 30_000) {
     return { ok: false, error: "Reminder delay must be at least 30 seconds" };
   }
+  const atMs = resolveExpiresAtMsFromDurationMs(delayMs);
+  if (atMs === undefined) {
+    return { ok: false, error: "Reminder time is outside the supported Date range" };
+  }
 
   return {
     ok: true,
     action: "add",
-    cronAction: buildOnceJob(params, delayMs, resolvedTo, resolvedAccountId),
+    cronAction: buildOnceJob(params, atMs, resolvedTo, resolvedAccountId),
     summary: `⏰ Reminder in ${formatDelay(delayMs)}: "${params.content}"`,
   };
 }