Converting date and time

Problem

We want to quickly convert standard date time format to POSIX time and vice versa.

Solution

The standard date can do this easily

Convert from date to POSIX

    date -d "17 June 2015 15:00:00" +%s
    > 1434520800

    # get current date in POSIX
    date +%s

Convert from POSIX to date

    date -d @1232144092
    > Sat Jan 17 07:14:52 JST 2009

By the way to set the current date

    date --set "25 July 2014 15:00:00"