"Tue, 06 Jan 1970 07:39:36"
Convert date and time to unixtime.
Another datetime format string at UTC
YYYYMMDD
19700106
Only TIME
07:39:36
General datetime
1970-01-06 07:39:36Z
For Database
1970-01-06 07:39:36
For HTTP1.1
Tue, 06 Jan 1970 07:39:36 GMT