"Tue, 10 Feb 1970 19:42:31"
Convert date and time to unixtime.
Another datetime format string at UTC
YYYYMMDD
19700210
Only TIME
19:42:31
General datetime
1970-02-10 19:42:31Z
For Database
1970-02-10 19:42:31
For HTTP1.1
Tue, 10 Feb 1970 19:42:31 GMT