What is this date format - 1574467220?

Question

Working with date/time

Api issues a file according to the timestamp, like 1574467220
This is not unix, 3 digits are missing. What is this format? How to generate the same for the current moment?

Answer 1

почему не unix?

Answer 2

Это уникс, добавьте три нуля будет утс

Answer 3

Вот тут проверьте
https://www.cy-pr.com/tools/time/