Enable different constructor variants

index.ts

@@ -15,8 +15,11 @@ export class UTCDate extends Date {
 
   constructor() {
     super();
-    // @ts-ignore - how to type the arguments?!
-    this.setTime(Date.UTC(...arguments));
+    if (arguments.length)
+      this.setTime(
+        // @ts-ignore - how to type the arguments?!
+        arguments.length === 1 ? arguments[0] : Date.UTC(...arguments)
+      );
 
     for (const method of getMethods) {
       // @ts-ignore - how to type overload?

package.json

@@ -1,6 +1,6 @@
 {
   "name": "@date-fns/utc",
-  "version": "0.3.0",
+  "version": "0.4.0",
   "description": "UTC date utils",
   "main": "index.js",
   "scripts": {

test.ts

@@ -8,6 +8,16 @@ describe("UTCDate", () => {
     );
   });
 
+  describe("constructor", () => {
+    it("allows to create current date", () => {
+      expect(new UTCDate().getTime() - Date.now()).toBeLessThan(100);
+    });
+
+    it("allows to create date using timestamp", () => {
+      expect(new UTCDate(540000000000).getTime()).toBe(540000000000);
+    });
+  });
+
   describe("getDate", () => {
     it("returns UTC date", () => {
       expect(new UTCDate(1987, 1, 11, 23).getDate()).toBe(11);