convert date utc code example

Example 1: javascript date to utc format

new Date().toISOString()
> '2012-11-04T14:51:06.157Z'

Example 2: epoch

Epoch timestamp is a unit of measurement for time. It is the number of
seconds elapsed since the countdown has started. 

Beginning epochs per system:
macOS - January 1, 1904
Windows - January 1, 1601
Unix - January 1, 1970