diff --git a/actions/setup/js/ephemerals.cjs b/actions/setup/js/ephemerals.cjs
index 846dbb6a20..0f09ea270f 100644
--- a/actions/setup/js/ephemerals.cjs
+++ b/actions/setup/js/ephemerals.cjs
@@ -2,11 +2,19 @@
 /// <reference types="@actions/github-script" />
 
 /**
- * Regex pattern to match expiration marker with checked checkbox
- * Allows flexible whitespace: - [x] expires <!-- gh-aw-expires: DATE --> on ...
- * Pattern is more resilient to spacing variations
+ * Regex pattern to match expiration marker with checked checkbox and HTML comment (new format)
+ * Format: > - [x] expires <!-- gh-aw-expires: ISO_DATE --> on HUMAN_DATE UTC
+ * Allows flexible whitespace and supports blockquote prefix
  */
-const EXPIRATION_PATTERN = /^-\s*\[x\]\s+expires\s*<!--\s*gh-aw-expires:\s*([^>]+)\s*-->/m;
+const EXPIRATION_PATTERN = /^>\s*-\s*\[x\]\s+expires\s*<!--\s*gh-aw-expires:\s*([^>]+)\s*-->/m;
+
+/**
+ * Regex pattern to match legacy expiration marker without HTML comment (old format)
+ * Format: > - [x] expires  on HUMAN_DATE UTC
+ * Allows flexible whitespace and supports blockquote prefix
+ * Captures the human-readable date for parsing
+ */
+const LEGACY_EXPIRATION_PATTERN = /^>\s*-\s*\[x\]\s+expires\s+on\s+(.+?)\s+UTC\s*$/m;
 
 /**
  * Format a Date object to human-readable string in UTC
@@ -34,25 +42,43 @@ function createExpirationLine(expirationDate) {
 
 /**
  * Extract expiration date from text body
+ * Supports two formats:
+ * 1. New format with HTML comment: > - [x] expires <!-- gh-aw-expires: ISO_DATE --> on HUMAN_DATE UTC
+ * 2. Legacy format without HTML comment: > - [x] expires  on HUMAN_DATE UTC
  * @param {string} body - Text body containing expiration marker
  * @returns {Date|null} Expiration date or null if not found/invalid
  */
 function extractExpirationDate(body) {
+  // Try new format with HTML comment first (preferred)
   const match = body.match(EXPIRATION_PATTERN);
 
-  if (!match) {
-    return null;
+  if (match) {
+    const expirationISO = match[1].trim();
+    const expirationDate = new Date(expirationISO);
+
+    // Validate the date
+    if (!isNaN(expirationDate.getTime())) {
+      return expirationDate;
+    }
   }
 
-  const expirationISO = match[1].trim();
-  const expirationDate = new Date(expirationISO);
+  // Fall back to legacy format without HTML comment
+  const legacyMatch = body.match(LEGACY_EXPIRATION_PATTERN);
+
+  if (legacyMatch) {
+    const humanReadableDate = legacyMatch[1].trim();
+    // Parse human-readable date format: "Jan 20, 2026, 9:20 AM"
+    // Add "UTC" timezone explicitly if not present to ensure UTC parsing
+    const dateString = humanReadableDate.includes("UTC") ? humanReadableDate : `${humanReadableDate} UTC`;
+    const expirationDate = new Date(dateString);
 
-  // Validate the date
-  if (isNaN(expirationDate.getTime())) {
-    return null;
+    // Validate the date
+    if (!isNaN(expirationDate.getTime())) {
+      return expirationDate;
+    }
   }
 
-  return expirationDate;
+  return null;
 }
 
 /**
@@ -126,6 +152,7 @@ function addExpirationToFooter(footer, expiresHours, entityType) {
 
 module.exports = {
   EXPIRATION_PATTERN,
+  LEGACY_EXPIRATION_PATTERN,
   formatExpirationDate,
   createExpirationLine,
   extractExpirationDate,
diff --git a/actions/setup/js/ephemerals.test.cjs b/actions/setup/js/ephemerals.test.cjs
index d5db0fc2c2..60110d211f 100644
--- a/actions/setup/js/ephemerals.test.cjs
+++ b/actions/setup/js/ephemerals.test.cjs
@@ -53,6 +53,37 @@ describe("ephemerals", () => {
       expect(result?.toISOString()).toBe("2026-01-25T15:54:08.894Z");
     });
 
+    it("should extract date from body with blockquote prefix (new format)", async () => {
+      const { extractExpirationDate } = await import("./ephemerals.cjs");
+      const body = "> AI generated by Workflow\n>\n> - [x] expires <!-- gh-aw-expires: 2026-01-25T15:54:08.894Z --> on Jan 25, 2026, 3:54 PM UTC";
+      const result = extractExpirationDate(body);
+
+      expect(result).toBeInstanceOf(Date);
+      expect(result?.toISOString()).toBe("2026-01-25T15:54:08.894Z");
+    });
+
+    it("should extract date from legacy format without HTML comment", async () => {
+      const { extractExpirationDate } = await import("./ephemerals.cjs");
+      const body = "> AI generated by Daily Team Status\n>\n> To add this workflow in your repository\n> - [x] expires  on Jan 20, 2026, 9:20 AM UTC";
+      const result = extractExpirationDate(body);
+
+      expect(result).toBeInstanceOf(Date);
+      expect(result?.toISOString()).toBe("2026-01-20T09:20:00.000Z");
+    });
+
+    it("should extract date from actual issue #10667 format", async () => {
+      const { extractExpirationDate } = await import("./ephemerals.cjs");
+      const body = `> AI generated by Daily Team Status
+>
+> To add this workflow in your repository, run \`gh aw add githubnext/agentics/workflows/daily-team-status.md@d3422bf940923ef1d43db5559652b8e1e71869f3\`. See usage guide.
+> - [x] expires  on Jan 20, 2026, 9:20 AM UTC
+`;
+      const result = extractExpirationDate(body);
+
+      expect(result).toBeInstanceOf(Date);
+      expect(result?.toISOString()).toBe("2026-01-20T09:20:00.000Z");
+    });
+
     it("should return null when no expiration marker found", async () => {
       const { extractExpirationDate } = await import("./ephemerals.cjs");
       const body = "Some text without expiration marker";
@@ -69,6 +100,14 @@ describe("ephemerals", () => {
       expect(result).toBeNull();
     });
 
+    it("should return null for invalid legacy date", async () => {
+      const { extractExpirationDate } = await import("./ephemerals.cjs");
+      const body = "> - [x] expires  on Invalid Date, 9999 UTC";
+      const result = extractExpirationDate(body);
+
+      expect(result).toBeNull();
+    });
+
     it("should handle standard expiration marker format", async () => {
       const { extractExpirationDate } = await import("./ephemerals.cjs");
       const body = "Some text\n- [x] expires <!-- gh-aw-expires: 2026-01-25T15:54:08.894Z --> on Jan 25, 2026\nMore text";
@@ -77,6 +116,17 @@ describe("ephemerals", () => {
       expect(result).toBeInstanceOf(Date);
       expect(result?.toISOString()).toBe("2026-01-25T15:54:08.894Z");
     });
+
+    it("should prefer new format over legacy when both present", async () => {
+      const { extractExpirationDate } = await import("./ephemerals.cjs");
+      // This would be malformed, but tests the priority
+      const body = "> - [x] expires <!-- gh-aw-expires: 2026-01-25T15:54:08.894Z --> on Jan 20, 2026, 9:20 AM UTC";
+      const result = extractExpirationDate(body);
+
+      expect(result).toBeInstanceOf(Date);
+      // Should use ISO date from HTML comment, not the human-readable date
+      expect(result?.toISOString()).toBe("2026-01-25T15:54:08.894Z");
+    });
   });
 
   describe("generateFooterWithExpiration", () => {
@@ -238,16 +288,54 @@ describe("ephemerals", () => {
       expect(EXPIRATION_PATTERN).toBeInstanceOf(RegExp);
     });
 
-    it("should match standard expiration line", async () => {
+    it("should match standard expiration line without blockquote", async () => {
       const { EXPIRATION_PATTERN } = await import("./ephemerals.cjs");
       const line = "- [x] expires <!-- gh-aw-expires: 2026-01-25T15:54:08.894Z --> on Jan 25, 2026";
+      // This should NOT match because the pattern requires blockquote prefix
+      expect(EXPIRATION_PATTERN.test(line)).toBe(false);
+    });
+
+    it("should match expiration line with blockquote prefix", async () => {
+      const { EXPIRATION_PATTERN } = await import("./ephemerals.cjs");
+      const line = "> - [x] expires <!-- gh-aw-expires: 2026-01-25T15:54:08.894Z --> on Jan 25, 2026";
       expect(EXPIRATION_PATTERN.test(line)).toBe(true);
     });
 
     it("should handle some whitespace variations", async () => {
       const { EXPIRATION_PATTERN } = await import("./ephemerals.cjs");
-      const line = "-  [x]  expires  <!-- gh-aw-expires: 2026-01-25T15:54:08.894Z -->";
+      const line = ">  -  [x]  expires  <!-- gh-aw-expires: 2026-01-25T15:54:08.894Z -->";
       expect(EXPIRATION_PATTERN.test(line)).toBe(true);
     });
   });
+
+  describe("LEGACY_EXPIRATION_PATTERN", () => {
+    it("should be exported", async () => {
+      const { LEGACY_EXPIRATION_PATTERN } = await import("./ephemerals.cjs");
+      expect(LEGACY_EXPIRATION_PATTERN).toBeInstanceOf(RegExp);
+    });
+
+    it("should match legacy format without HTML comment", async () => {
+      const { LEGACY_EXPIRATION_PATTERN } = await import("./ephemerals.cjs");
+      const line = "> - [x] expires  on Jan 20, 2026, 9:20 AM UTC";
+      expect(LEGACY_EXPIRATION_PATTERN.test(line)).toBe(true);
+    });
+
+    it("should match legacy format with minimal whitespace", async () => {
+      const { LEGACY_EXPIRATION_PATTERN } = await import("./ephemerals.cjs");
+      const line = "> - [x] expires on Jan 20, 2026, 9:20 AM UTC";
+      expect(LEGACY_EXPIRATION_PATTERN.test(line)).toBe(true);
+    });
+
+    it("should NOT match new format with HTML comment", async () => {
+      const { LEGACY_EXPIRATION_PATTERN } = await import("./ephemerals.cjs");
+      const line = "> - [x] expires <!-- gh-aw-expires: 2026-01-25T15:54:08.894Z --> on Jan 25, 2026 UTC";
+      expect(LEGACY_EXPIRATION_PATTERN.test(line)).toBe(false);
+    });
+
+    it("should NOT match without UTC suffix", async () => {
+      const { LEGACY_EXPIRATION_PATTERN } = await import("./ephemerals.cjs");
+      const line = "> - [x] expires on Jan 20, 2026, 9:20 AM";
+      expect(LEGACY_EXPIRATION_PATTERN.test(line)).toBe(false);
+    });
+  });
 });