"Tue, 17 Feb 1970 23:32:14"
Convert date and time to unixtime.
Another datetime format string at UTC
YYYYMMDD
19700217
Only TIME
23:32:14
General datetime
1970-02-17 23:32:14Z
For Database
1970-02-17 23:32:14
For HTTP1.1
Tue, 17 Feb 1970 23:32:14 GMT