diff --git a/packages/predate-website/docs/api/isDateTimeEqual.md b/packages/predate-website/docs/api/isDateTimeEqual.md
new file mode 100644
index 0000000..bd652c4
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+++ b/packages/predate-website/docs/api/isDateTimeEqual.md
@@ -0,0 +1,10 @@
+# `isDateTimeEqual`
+
+The `isDateTimeEqual` function checks if day, month, year, hours, minutes, seconds and milliseconds are equal.
+
+```ts
+function isDateTimeEqual(
+  first: PreDateTime,
+  second: PreDateTime
+): boolean;
+```
diff --git a/packages/predate/src/isDateTimeEqual.test.ts b/packages/predate/src/isDateTimeEqual.test.ts
new file mode 100644
index 0000000..8cd9fe7
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+++ b/packages/predate/src/isDateTimeEqual.test.ts
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+/* eslint-disable functional/functional-parameters */
+/* eslint-disable functional/no-return-void */
+/* eslint-disable functional/no-expression-statement */
+import { createDateTime } from "./createDateTime";
+import { isDateTimeEqual } from "./isDateTimeEqual";
+
+describe("isDateTimeEqual", () => {
+  it("should return \"true\" when two equal \"PreDateTime\" are given", () => {
+    const firstDate = createDateTime.fromArray([2022, 0, 1, 12, 15, 30, 60]);
+    const secondDate = createDateTime.fromArray([2022, 0, 1, 12, 15, 30, 60]);
+
+    const actualIsEqual = isDateTimeEqual(firstDate, secondDate);
+
+    expect(actualIsEqual).toBe(true);
+  });
+
+  it("should return \"false\" when two unequal \"PreDateTime\" are given", () => {
+    const firstDate = createDateTime.fromArray([2022, 0, 1, 12, 15, 30, 60]);
+    const secondDate = createDateTime.fromArray([2022, 1, 1, 12, 15, 30, 60]);
+
+    const actualIsEqual = isDateTimeEqual(firstDate, secondDate);
+
+    expect(actualIsEqual).toBe(false);
+  });
+});
diff --git a/packages/predate/src/isDateTimeEqual.ts b/packages/predate/src/isDateTimeEqual.ts
new file mode 100644
index 0000000..a81d9d1
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+++ b/packages/predate/src/isDateTimeEqual.ts
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+import { PreDateTime } from "./types";
+
+/**
+ * Checks if day, month, year, hours, minutes, seconds and milliseconds are equal.
+ * @param first
+ * @param second
+ * @returns
+ */
+export const isDateTimeEqual = (
+  first: PreDateTime,
+  second: PreDateTime
+): boolean => {
+  return (
+    first.day === second.day &&
+    first.month === second.month &&
+    first.year === second.year &&
+    first.hours === second.hours &&
+    first.minutes === second.minutes &&
+    first.seconds === second.seconds &&
+    first.milliseconds === second.milliseconds
+  );
+};