Why are dates calculated from January 1st, 1970?

Question

Is there any reason behind using date(January 1st, 1970) as default standard for time manipulation? I have seen this standard in Java as well as in Python. These two languag

Answer 1

why its always 1st jan 1970 , Because - '1st January 1970' usually called as "epoch date" is the date when the time started for Unix computers, and that timestamp is marked as '0'. Any time since that date is calculated based on the number of seconds elapsed. In simpler words... the timestamp of any date will be difference in seconds between that date and '1st January 1970' The time stamp is just a integer which started from number '0' on 'Midnight 1st January 1970' and goes on incrementing by '1' as each second pass For conversion of UNIX timestamps to readable dates PHP and other open source languages provides built in functions.