diff --git a/client/src/components/generic/Event/EventUtils.test.ts b/client/src/components/generic/Event/EventUtils.test.ts
new file mode 100644
index 00000000..5b3730e0
--- /dev/null
+++ b/client/src/components/generic/Event/EventUtils.test.ts
@@ -0,0 +1,33 @@
+import { EventRenderingUtils } from "./EventUtils"
+
+describe("dateTimeLocalPlaceHolder", () => {
+  it("should return a formatted string in ISO 8601 format without milliseconds", () => {
+    const date = new Date("2024-11-01T23:34:15.123Z")
+    const result = EventRenderingUtils.dateTimeLocalPlaceHolder(date)
+    expect(result).toBe("2024-11-01T23:34:15")
+  })
+
+  it("should handle dates without milliseconds correctly", () => {
+    const date = new Date("2024-11-01T23:34:15Z")
+    const result = EventRenderingUtils.dateTimeLocalPlaceHolder(date)
+    expect(result).toBe("2024-11-01T23:34:15")
+  })
+
+  it("should handle different time zones correctly", () => {
+    const date = new Date("2024-11-01T23:34:15.123+09:00")
+    const result = EventRenderingUtils.dateTimeLocalPlaceHolder(date)
+    expect(result).toBe("2024-11-01T14:34:15")
+  })
+
+  it("should handle leap years correctly", () => {
+    const date = new Date("2024-02-29T23:34:15.123Z")
+    const result = EventRenderingUtils.dateTimeLocalPlaceHolder(date)
+    expect(result).toBe("2024-02-29T23:34:15")
+  })
+
+  it("should handle dates before 1970 correctly", () => {
+    const date = new Date("1969-12-31T23:34:15.123Z")
+    const result = EventRenderingUtils.dateTimeLocalPlaceHolder(date)
+    expect(result).toBe("1969-12-31T23:34:15")
+  })
+})