diff --git a/packages/cli/src/__tests__/task-list-board-columns.test.ts b/packages/cli/src/__tests__/task-list-board-columns.test.ts
index 7cd12f1a39..5f6b35d8b5 100644
--- a/packages/cli/src/__tests__/task-list-board-columns.test.ts
+++ b/packages/cli/src/__tests__/task-list-board-columns.test.ts
@@ -1,5 +1,5 @@
 /*
-FNXC:CliBoardVocabulary 2026-07-30-24:40:
+FNXC:CliBoardVocabulary 2026-07-30-23:40:
 THE INVARIANT: `fn task list` prints every card, whatever its board calls the lane.
 
 `runTaskList` iterated the six-id `COLUMNS` constant and filtered `t.column === col`, so a card in a
diff --git a/packages/cli/src/commands/task.ts b/packages/cli/src/commands/task.ts
index 0910150670..d449ca0bf4 100644
--- a/packages/cli/src/commands/task.ts
+++ b/packages/cli/src/commands/task.ts
@@ -26,7 +26,7 @@ function columnLabel(column: ColumnId): string {
 }
 
 /*
-FNXC:CliBoardVocabulary 2026-07-30-24:40:
+FNXC:CliBoardVocabulary 2026-07-30-23:40:
 The lanes `fn task list` prints, derived from the CARDS rather than from the legacy enum.
 
 `runTaskList` iterated the six-id `COLUMNS` constant and filtered `t.column === col`, so a task in a
@@ -633,7 +633,7 @@ export async function runTaskList(projectName?: string) {
   }
 
   /*
-  FNXC:CliBoardVocabulary 2026-07-30-24:40:
+  FNXC:CliBoardVocabulary 2026-07-30-23:40:
   Iterate the columns the BOARD has, not the legacy six — a renamed card was not printed AT ALL.
 
   This loop ran `for (const col of COLUMNS)` and filtered `t.column === col`, so any task in a
diff --git a/scripts/__tests__/recover-stale-blocked-by.test.mjs b/scripts/__tests__/recover-stale-blocked-by.test.mjs
index fdbb4b57e3..7c3e85c125 100644
--- a/scripts/__tests__/recover-stale-blocked-by.test.mjs
+++ b/scripts/__tests__/recover-stale-blocked-by.test.mjs
@@ -119,7 +119,7 @@ test("treats soft-deleted blockers as missing and never plans for deleted depend
 });
 
 /*
-FNXC:OperatorScriptLaneAssumptions 2026-07-30-25:30:
+FNXC:OperatorScriptLaneAssumptions 2026-07-30-23:30:
 THE INVARIANT: a board this script cannot reason about is REPORTED, never silently skipped.
 
 Every lane test in the planner is a legacy id, and the candidate gate is `row.column !== "todo"`, so a
diff --git a/scripts/check-fnxc-future-dates.mjs b/scripts/check-fnxc-future-dates.mjs
index 3cd1710b60..52e38a2ae6 100644
--- a/scripts/check-fnxc-future-dates.mjs
+++ b/scripts/check-fnxc-future-dates.mjs
@@ -41,6 +41,32 @@ shape the rule actually prescribes, which is the worst possible subset to miss.
 */
 const STAMP = /FNXC:[A-Za-z0-9_-]+\s+(\d{4}-\d{2}-\d{2})/g;
 
+/*
+FNXC:FnxcStampHygiene 2026-07-30-21:40:
+THE HOUR WAS NEVER VALIDATED, so `2026-07-30-25:30` passed this gate.
+
+`STAMP` captures only the date, and the future check compares that capture alone — a stamp could
+carry any `hh:mm` at all. Four stamps on `main` already read `-24:40` or `-24:00`, and a fifth
+`-25:30` arrived with the next PR. AGENTS.md specifies `yyyy-MM-dd-hh:mm`, where `hh` is a clock
+hour, and the whole point of the stamp is to make the FNXC record a readable chronology; a time that
+cannot exist quietly costs it that.
+
+Counted per file alongside the future-dated population rather than as a separate gate, because it is
+the same defect class — a stamp that does not describe a real moment — and one ratchet is cheaper to
+keep honest than two.
+*/
+const STAMP_TIME = /FNXC:[A-Za-z0-9_-]+\s+\d{4}-\d{2}-\d{2}-(\d{2}):(\d{2})/g;
+
+/** Hours 00-23, minutes 00-59. Returns the count of stamps whose clock time cannot exist. */
+function impossibleClockTimes(source) {
+  let bad = 0;
+  STAMP_TIME.lastIndex = 0;
+  for (const match of source.matchAll(STAMP_TIME)) {
+    if (Number(match[1]) > 23 || Number(match[2]) > 59) bad += 1;
+  }
+  return bad;
+}
+
 function* walk(dir) {
   for (const entry of readdirSync(dir)) {
     if (SKIP_DIRS.has(entry)) continue;
@@ -87,6 +113,7 @@ function scan() {
       STAMP.lastIndex = 0;
       let hits = 0;
       for (const match of source.matchAll(STAMP)) if (match[1] > today) hits += 1;
+      hits += impossibleClockTimes(source);
       if (hits > 0) counts[relative(REPO, file).split("\\").join("/")] = hits;
     }
   }
diff --git a/scripts/check-lane-wiring.mjs b/scripts/check-lane-wiring.mjs
index 6491e2a737..af4921df1d 100644
--- a/scripts/check-lane-wiring.mjs
+++ b/scripts/check-lane-wiring.mjs
@@ -15,7 +15,7 @@ import { findLaneAcceptingFunctions, findUnwiredCallSites } from "./lib/lane-wir
 const ROOT = process.cwd();
 const BASELINE = join(ROOT, "scripts/lib/lane-wiring-baseline.json");
 /*
-FNXC:WorkflowLifecycleColumns 2026-07-30-24:00:
+FNXC:WorkflowLifecycleColumns 2026-07-30-23:00:
 `packages/dashboard/app` and `plugins` are scanned, and `.tsx` counts — their absence was the
 blind spot the OLDER guard already learned about and this one re-opened.
 
diff --git a/scripts/recover-stale-blocked-by.mjs b/scripts/recover-stale-blocked-by.mjs
index 068496ecda..5e1678e098 100644
--- a/scripts/recover-stale-blocked-by.mjs
+++ b/scripts/recover-stale-blocked-by.mjs
@@ -66,7 +66,7 @@ function isTerminalColumn(column) {
 }
 
 /*
-FNXC:OperatorScriptLaneAssumptions 2026-07-30-25:30:
+FNXC:OperatorScriptLaneAssumptions 2026-07-30-23:30:
 Refuse to look healthy on a board this script cannot reason about.
 
 Every lane test here is a legacy id: `isTerminalColumn` is done/archived, "active" is