"Mon, 09 Feb 1970 14:57:14"
Convert date and time to unixtime.
Another datetime format string at UTC
YYYYMMDD
19700209
Only TIME
14:57:14
General datetime
1970-02-09 14:57:14Z
For Database
1970-02-09 14:57:14
For HTTP1.1
Mon, 09 Feb 1970 14:57:14 GMT