"Wed, 04 Feb 1970 12:33:38"
Convert date and time to unixtime.
Another datetime format string at UTC
YYYYMMDD
19700204
Only TIME
12:33:38
General datetime
1970-02-04 12:33:38Z
For Database
1970-02-04 12:33:38
For HTTP1.1
Wed, 04 Feb 1970 12:33:38 GMT