diff --git a/tests/utils/time.test.ts b/tests/utils/time.test.ts
new file mode 100644
index 0000000..49c625d
--- /dev/null
+++ b/tests/utils/time.test.ts
@@ -0,0 +1,31 @@
+import { showDate } from "../../src/utils/time";
+
+describe("Date with correct timezone", () => {
+  const map: Map<string, unknown> = new Map([["u_time_at", "@"]]);
+  const date = new Date(1727434767686);
+  {
+    const name = "fr";
+    test(name, () => {
+      expect(showDate(name, map, date)).toBe("27/09/2024 @ 12:59:27");
+    });
+  }
+  {
+    const name = "en-US";
+    test(name, () => {
+      expect(showDate(name, map, date)).toBe("9/27/24, @ 1:59:27");
+    });
+  }
+  {
+    const name = "unknown";
+    test(name, () => {
+      expect(showDate(name, map, date)).toBe("27/09/2024 @ 10:59:27");
+    });
+  }
+  {
+    const name = "zh-CN";
+    test(name, () => {
+      expect(showDate(name, map, date)).toBe("2024/9/27 @ 18:59:27");
+    });
+  }
+});
+