"Mon, 11 May 1970 07:11:03"
Convert date and time to unixtime.
Another datetime format string at UTC
YYYYMMDD
19700511
Only TIME
07:11:03
General datetime
1970-05-11 07:11:03Z
For Database
1970-05-11 07:11:03
For HTTP1.1
Mon, 11 May 1970 07:11:03 GMT