"Mon, 02 Feb 1970 07:49:37"
Convert date and time to unixtime.
Another datetime format string at UTC
YYYYMMDD
19700202
Only TIME
07:49:37
General datetime
1970-02-02 07:49:37Z
For Database
1970-02-02 07:49:37
For HTTP1.1
Mon, 02 Feb 1970 07:49:37 GMT