How to properly clone a Date in Typescript

I have the following function that must clone a class (this) and return a new clone of it. In this case the class is called Tag

clone(): Tag {
        // Create a new instance of Tag
        let newItem = new Tag();

        newItem.id = this.id;
        newItem.userId = this.userId;
        newItem._tag = this._tag;
        newItem._color = this._color;
        
        // deep copy of Date objects
        newItem._createdOn =  new Date(this._createdOn.valueOf());
        newItem._updatedOn =  new Date(this._updatedOn.valueOf());
        newItem._archivedOn = this._archivedOn ? new Date(this._archivedOn.getTime()) : undefined;
        
        return newItem;
    }

In the accompanying Unit Test, I test for equality in the clone

describe("clone", () => {
        it("should create an identical copy of the tag", () => {
            const userId = uuidv4();
            let tag = fakeTag(userId);
            
            const clone = tag.clone();
            
            expect(clone.id).toEqual(tag.id);
            expect(clone.userId).toEqual(tag.userId);
            expect(clone.tag).toEqual(tag.tag);
            expect(clone.color).toEqual(tag.color);

// Errors appear here 
expect(clone.updatedOn.getTime()).toBeCloseTo(tag.updatedOn.getTime(), 2);
            expect(clone.createdOn.getTime()).toBeCloseTo(tag.createdOn.getTime(), 2);
        });
    });

Everything works until

expect(clone.updatedOn.getTime()).toBeCloseTo(tag.updatedOn.getTime(), 2);

This is the test output

expect(received).toBeCloseTo(expected, precision)

Expected: 1728162863968
Received: 1728241129040

Expected precision:    2
Expected difference: < 0.005
Received difference:   78265072

I have also tried the following to no avail

expect(clone.updatedOn.getTime()).toEqual(tag.updatedOn.getTime());

I have read quite a few Date clone S/O texts, but I don’t get why I’m still getting this error. There is something I’m doing wrong