diff --git a/cwd-admin/src/api/admin.ts b/cwd-admin/src/api/admin.ts
index 8547c44..2f4290a 100644
--- a/cwd-admin/src/api/admin.ts
+++ b/cwd-admin/src/api/admin.ts
@@ -97,7 +97,7 @@ export type VisitPageItem = {
 	postTitle: string | null;
 	postUrl: string | null;
 	pv: number;
-	lastVisitAt: string | null;
+	lastVisitAt: number | null;
 };
 
 export type VisitPagesResponse = {
diff --git a/cwd-admin/src/views/AnalyticsVisitView.vue b/cwd-admin/src/views/AnalyticsVisitView.vue
index c2c1b9c..0cd162e 100644
--- a/cwd-admin/src/views/AnalyticsVisitView.vue
+++ b/cwd-admin/src/views/AnalyticsVisitView.vue
@@ -127,13 +127,27 @@ function showToast(msg: string, type: "success" | "error" = "success") {
   }, 2000);
 }
 
-function formatTime(value: string | null): string {
+function formatTime(value: string | number | null | undefined): string {
   if (!value) {
     return "-";
   }
-  const date = new Date(value);
+  let date: Date;
+  if (typeof value === "number") {
+    date = new Date(value);
+  } else {
+    const trimmed = value.trim();
+    if (!trimmed) {
+      return "-";
+    }
+    if (/^\d+$/.test(trimmed)) {
+      const ts = Number(trimmed);
+      date = new Date(ts);
+    } else {
+      date = new Date(trimmed);
+    }
+  }
   if (Number.isNaN(date.getTime())) {
-    return value;
+    return "-";
   }
   const y = date.getFullYear();
   const m = String(date.getMonth() + 1).padStart(2, "0");
diff --git a/cwd-api/src/api/admin/visitAnalytics.ts b/cwd-api/src/api/admin/visitAnalytics.ts
index 3619665..0ad4857 100644
--- a/cwd-api/src/api/admin/visitAnalytics.ts
+++ b/cwd-api/src/api/admin/visitAnalytics.ts
@@ -45,7 +45,7 @@ export const getVisitOverview = async (
 		const domainFilter = rawDomain.trim().toLowerCase();
 
 		await c.env.CWD_DB.prepare(
-			'CREATE TABLE IF NOT EXISTS page_stats (id INTEGER PRIMARY KEY AUTOINCREMENT, post_slug TEXT UNIQUE NOT NULL, post_title TEXT, post_url TEXT, pv INTEGER NOT NULL DEFAULT 0, last_visit_at TEXT, created_at TEXT NOT NULL, updated_at TEXT NOT NULL)'
+			'CREATE TABLE IF NOT EXISTS page_stats (id INTEGER PRIMARY KEY AUTOINCREMENT, post_slug TEXT UNIQUE NOT NULL, post_title TEXT, post_url TEXT, pv INTEGER NOT NULL DEFAULT 0, last_visit_at INTEGER, created_at INTEGER NOT NULL, updated_at INTEGER NOT NULL)'
 		).run();
 
 		await c.env.CWD_DB.prepare(
@@ -59,7 +59,7 @@ export const getVisitOverview = async (
 			post_title: string | null;
 			post_url: string | null;
 			pv: number;
-			last_visit_at: string | null;
+			last_visit_at: number | null;
 		}>();
 
 		let totalPv = 0;
@@ -150,7 +150,7 @@ export const getVisitPages = async (c: Context<{ Bindings: Bindings }>) => {
 		const domainFilter = rawDomain.trim().toLowerCase();
 
 		await c.env.CWD_DB.prepare(
-			'CREATE TABLE IF NOT EXISTS page_stats (id INTEGER PRIMARY KEY AUTOINCREMENT, post_slug TEXT UNIQUE NOT NULL, post_title TEXT, post_url TEXT, pv INTEGER NOT NULL DEFAULT 0, last_visit_at TEXT, created_at TEXT NOT NULL, updated_at TEXT NOT NULL)'
+			'CREATE TABLE IF NOT EXISTS page_stats (id INTEGER PRIMARY KEY AUTOINCREMENT, post_slug TEXT UNIQUE NOT NULL, post_title TEXT, post_url TEXT, pv INTEGER NOT NULL DEFAULT 0, last_visit_at INTEGER, created_at INTEGER NOT NULL, updated_at INTEGER NOT NULL)'
 		).run();
 
 		const { results } = await c.env.CWD_DB.prepare(
@@ -160,7 +160,7 @@ export const getVisitPages = async (c: Context<{ Bindings: Bindings }>) => {
 			post_title: string | null;
 			post_url: string | null;
 			pv: number;
-			last_visit_at: string | null;
+			last_visit_at: number | null;
 		}>();
 
 		const items: VisitPageItem[] = [];
diff --git a/cwd-api/src/api/public/trackVisit.ts b/cwd-api/src/api/public/trackVisit.ts
index 7cdf2c5..212407d 100644
--- a/cwd-api/src/api/public/trackVisit.ts
+++ b/cwd-api/src/api/public/trackVisit.ts
@@ -39,7 +39,7 @@ export const trackVisit = async (c: Context<{ Bindings: Bindings }>) => {
 		}
 
 		await c.env.CWD_DB.prepare(
-			'CREATE TABLE IF NOT EXISTS page_stats (id INTEGER PRIMARY KEY AUTOINCREMENT, post_slug TEXT UNIQUE NOT NULL, post_title TEXT, post_url TEXT, pv INTEGER NOT NULL DEFAULT 0, last_visit_at TEXT, created_at TEXT NOT NULL, updated_at TEXT NOT NULL)'
+			'CREATE TABLE IF NOT EXISTS page_stats (id INTEGER PRIMARY KEY AUTOINCREMENT, post_slug TEXT UNIQUE NOT NULL, post_title TEXT, post_url TEXT, pv INTEGER NOT NULL DEFAULT 0, last_visit_at INTEGER, created_at INTEGER NOT NULL, updated_at INTEGER NOT NULL)'
 		).run();
 
 		await c.env.CWD_DB.prepare(
@@ -47,6 +47,7 @@ export const trackVisit = async (c: Context<{ Bindings: Bindings }>) => {
 		).run();
 
 		const nowDate = new Date();
+		const nowTs = nowDate.getTime();
 		const nowIso = nowDate.toISOString();
 		const today = nowIso.slice(0, 10);
 
@@ -70,9 +71,9 @@ export const trackVisit = async (c: Context<{ Bindings: Bindings }>) => {
 					rawPostTitle || null,
 					rawPostUrl || null,
 					1,
-					nowIso,
-					nowIso,
-					nowIso
+					nowTs,
+					nowTs,
+					nowTs
 				)
 				.run();
 		} else {
@@ -84,8 +85,8 @@ export const trackVisit = async (c: Context<{ Bindings: Bindings }>) => {
 					rawPostTitle || null,
 					rawPostUrl || null,
 					newPv,
-					nowIso,
-					nowIso,
+					nowTs,
+					nowTs,
 					existing.id
 				)
 				.run();