feat(openclaw): label "Current time" as UTC in injected memory context

Append ` UTC` to the `Current time -` header injected above recalled
memories. Without the label the LLM read the timestamp as local time and
made wrong recency judgments. This is the same fix that landed for the
Claude Code integration in #1568 — the OpenClaw integration was overlooked.

Closes #1789

Author: nicoloboschi

hindsight-integrations/openclaw/src/index.test.ts

@@ -2,6 +2,7 @@ import { describe, it, expect } from "vitest";
 import {
   stripMemoryTags,
   extractRecallQuery,
+  formatCurrentTimeForRecall,
   formatMemories,
   prepareRetentionTranscript,
   countUserTurns,
@@ -249,6 +250,22 @@ describe("formatMemories", () => {
   });
 });
 
+// ---------------------------------------------------------------------------
+// formatCurrentTimeForRecall — UTC label (#1789, mirrors #1568)
+// ---------------------------------------------------------------------------
+
+describe("formatCurrentTimeForRecall", () => {
+  it("renders the UTC suffix so the LLM doesn't misread it as local time", () => {
+    const fixed = new Date(Date.UTC(2026, 4, 27, 16, 25, 0)); // 2026-05-27 16:25 UTC
+    expect(formatCurrentTimeForRecall(fixed)).toBe("2026-05-27 16:25 UTC");
+  });
+
+  it("zero-pads month / day / hours / minutes", () => {
+    const fixed = new Date(Date.UTC(2026, 0, 3, 4, 5, 0));
+    expect(formatCurrentTimeForRecall(fixed)).toBe("2026-01-03 04:05 UTC");
+  });
+});
+
 // ---------------------------------------------------------------------------
 // retention helpers
 // ---------------------------------------------------------------------------

hindsight-integrations/openclaw/src/index.ts

@@ -316,13 +316,16 @@ async function flushRetainQueue(): Promise<void> {
 const DEFAULT_RECALL_PROMPT_PREAMBLE =
   "Relevant memories from past conversations (prioritize recent when conflicting). Only use memories that are directly useful to continue this conversation; ignore the rest:";
 
-function formatCurrentTimeForRecall(date = new Date()): string {
+export function formatCurrentTimeForRecall(date = new Date()): string {
   const year = date.getUTCFullYear();
   const month = String(date.getUTCMonth() + 1).padStart(2, "0");
   const day = String(date.getUTCDate()).padStart(2, "0");
   const hours = String(date.getUTCHours()).padStart(2, "0");
   const minutes = String(date.getUTCMinutes()).padStart(2, "0");
-  return `${year}-${month}-${day} ${hours}:${minutes}`;
+  // Suffix with " UTC" so the LLM doesn't misread the timestamp as local
+  // time and make wrong recency judgments. Mirrors the fix landed for the
+  // Claude Code integration in #1568. (#1789)
+  return `${year}-${month}-${day} ${hours}:${minutes} UTC`;
 }
 
 /**