"Tue, 17 Mar 1970 07:11:44"
Convert date and time to unixtime.
Another datetime format string at UTC
YYYYMMDD
19700317
Only TIME
07:11:44
General datetime
1970-03-17 07:11:44Z
For Database
1970-03-17 07:11:44
For HTTP1.1
Tue, 17 Mar 1970 07:11:44 GMT