"Tue, 03 Feb 1970 02:46:31"
Convert date and time to unixtime.
Another datetime format string at UTC
YYYYMMDD
19700203
Only TIME
02:46:31
General datetime
1970-02-03 02:46:31Z
For Database
1970-02-03 02:46:31
For HTTP1.1
Tue, 03 Feb 1970 02:46:31 GMT