"Mon, 02 Feb 1970 07:51:31"
Convert date and time to unixtime.
Another datetime format string at UTC
YYYYMMDD
19700202
Only TIME
07:51:31
General datetime
1970-02-02 07:51:31Z
For Database
1970-02-02 07:51:31
For HTTP1.1
Mon, 02 Feb 1970 07:51:31 GMT