"Sat, 14 Mar 1970 07:11:31"
Convert date and time to unixtime.
Another datetime format string at UTC
YYYYMMDD
19700314
Only TIME
07:11:31
General datetime
1970-03-14 07:11:31Z
For Database
1970-03-14 07:11:31
For HTTP1.1
Sat, 14 Mar 1970 07:11:31 GMT