"Tue, 06 Jan 1970 05:52:56"
Convert date and time to unixtime.
Another datetime format string at UTC
YYYYMMDD
19700106
Only TIME
05:52:56
General datetime
1970-01-06 05:52:56Z
For Database
1970-01-06 05:52:56
For HTTP1.1
Tue, 06 Jan 1970 05:52:56 GMT