"Tue, 27 Jan 1970 14:12:14"
Convert date and time to unixtime.
Another datetime format string at UTC
YYYYMMDD
19700127
Only TIME
14:12:14
General datetime
1970-01-27 14:12:14Z
For Database
1970-01-27 14:12:14
For HTTP1.1
Tue, 27 Jan 1970 14:12:14 GMT