"Mon, 16 Mar 1970 07:12:03"
Convert date and time to unixtime.
Another datetime format string at UTC
YYYYMMDD
19700316
Only TIME
07:12:03
General datetime
1970-03-16 07:12:03Z
For Database
1970-03-16 07:12:03
For HTTP1.1
Mon, 16 Mar 1970 07:12:03 GMT