"Wed, 07 Jan 1970 12:33:31"
Convert date and time to unixtime.
Another datetime format string at UTC
YYYYMMDD
19700107
Only TIME
12:33:31
General datetime
1970-01-07 12:33:31Z
For Database
1970-01-07 12:33:31
For HTTP1.1
Wed, 07 Jan 1970 12:33:31 GMT