"Mon, 23 Mar 1970 07:11:17"
Convert date and time to unixtime.
Another datetime format string at UTC
YYYYMMDD
19700323
Only TIME
07:11:17
General datetime
1970-03-23 07:11:17Z
For Database
1970-03-23 07:11:17
For HTTP1.1
Mon, 23 Mar 1970 07:11:17 GMT