If you are given a timestamp (seconds since the Unix
epoch) and you try to parse it
with JavaScript's new Date(),
you are going to get a suprising result.
> new Date(1618499080)
Mon Jan 19 1970 11:34:59 GMT-0600 (Central Standard Time)1970? I was expected something more in the current millenia.
This is because JavaScript's new Date() expects a timestamp to be in milliseconds. Passing in a seconds representation of a timestamp, when it should be milliseconds, is going to result in a time pretty near the original Unix epoch.
Instead what you need to do is multiple that seconds value by 1000 to get
it in terms of milliseconds.
> new Date(1618499080 * 1000)
Thu Apr 15 2021 10:04:40 GMT-0500 (Central Daylight Time)Also, notice that if I run + new Date() without any argument, it
provides the current timestamp in milliseconds.
> + new Date()
1618499080598