"Fri, 09 Jan 1970 07:39:31"
Convert date and time to unixtime.
Another datetime format string at UTC
YYYYMMDD
19700109
Only TIME
07:39:31
General datetime
1970-01-09 07:39:31Z
For Database
1970-01-09 07:39:31
For HTTP1.1
Fri, 09 Jan 1970 07:39:31 GMT