"Fri, 02 Jan 1970 19:45:31"
Convert date and time to unixtime.
Another datetime format string at UTC
YYYYMMDD
19700102
Only TIME
19:45:31
General datetime
1970-01-02 19:45:31Z
For Database
1970-01-02 19:45:31
For HTTP1.1
Fri, 02 Jan 1970 19:45:31 GMT