"Wed, 04 Feb 1970 07:54:37"
Convert date and time to unixtime.
Another datetime format string at UTC
YYYYMMDD
19700204
Only TIME
07:54:37
General datetime
1970-02-04 07:54:37Z
For Database
1970-02-04 07:54:37
For HTTP1.1
Wed, 04 Feb 1970 07:54:37 GMT