"Wed, 04 Feb 1970 21:43:01"
Convert date and time to unixtime.
Another datetime format string at UTC
YYYYMMDD
19700204
Only TIME
21:43:01
General datetime
1970-02-04 21:43:01Z
For Database
1970-02-04 21:43:01
For HTTP1.1
Wed, 04 Feb 1970 21:43:01 GMT