Is it safe to compare JavaScript's getTime() across different systems?

JavaScript's getTime() returns "the number of milliseconds since 1 January 1970 00:00:00 UTC".

Can I rely on this being similar across different machines? I don't need it to be accurate to the millisecond, just to a few seconds.

Or do I need to use an external time service API, as in this question?

Where does JavaScript get the current time from - is it dependent on the machine's clock?

Answers

Can I rely on this being similar across different machines?

No.

Where does JavaScript get the current time from

The system datetime on which this javascript runs.

Or do I need to use an external time service API, as in this question?

You could use the server's time and send it to the client.

I have a list of dictionary as follows:

I'm writing a library that I'd like end-users to be able to optionally use as if its methods and functions were not coroutines.