"Mon, 02 Feb 1970 15:13:07"
Convert date and time to unixtime.
Another datetime format string at UTC
YYYYMMDD
19700202
Only TIME
15:13:07
General datetime
1970-02-02 15:13:07Z
For Database
1970-02-02 15:13:07
For HTTP1.1
Mon, 02 Feb 1970 15:13:07 GMT