timestamp UNIX code example

Example 1: from datetime to unix timestamp

import time
import datetime
d = datetime.date(2015,1,5)

unixtime = time.mktime(d.timetuple())
unixtime

Example 2: unix timestamp bash

date +%s 

# Give the number of seconds since epoch

Example 3: 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