Difference Between New Date(...).gettime() And Date.utc(...)
Can someone explain why this two commands returns different results: > new Date(2019, 0, 1).getTime() > 1546293600000 > Date.UTC(2019, 0, 1) > 1546300800000 According
Solution 1:
new Date(2019, 0, 1) creates a Date object representing the start of January, 1, 2019 in your locale specificed timezone. When converted to UTC, it will be a different time than the start of Jan 1 in UTC.
Running your second snippet to add one year gives the correct result for me. What browser or context are you running in?
Solution 2:
new Date(2019, 0, 1) makes an object from your timezone, whereas Date.UTC(2019, 0, 1) gives you the timestamp in UTC.
I am in CE(S)T, so there will be a difference of 1 hour, 3600000 milliseconds:
new Date(2019, 0, 1).getTime() // time in CEST
> 1546297200000
Date.UTC(2019, 0, 1) // time in UTC
> 1546300800000
new Date(2019, 0, 1).getTime() - Date.UTC(2019, 0, 1) // Subtract my time from UTC (I'm ahead, so the difference will be negative)
> -3600000
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