"Wed, 04 Feb 1970 23:32:40"
Convert date and time to unixtime.
Another datetime format string at UTC
YYYYMMDD
19700204
Only TIME
23:32:40
General datetime
1970-02-04 23:32:40Z
For Database
1970-02-04 23:32:40
For HTTP1.1
Wed, 04 Feb 1970 23:32:40 GMT