"Tue, 06 Jan 1970 09:15:56"
Convert date and time to unixtime.
Another datetime format string at UTC
YYYYMMDD
19700106
Only TIME
09:15:56
General datetime
1970-01-06 09:15:56Z
For Database
1970-01-06 09:15:56
For HTTP1.1
Tue, 06 Jan 1970 09:15:56 GMT