"Wed, 04 Feb 1970 19:45:40"
Convert date and time to unixtime.
Another datetime format string at UTC
YYYYMMDD
19700204
Only TIME
19:45:40
General datetime
1970-02-04 19:45:40Z
For Database
1970-02-04 19:45:40
For HTTP1.1
Wed, 04 Feb 1970 19:45:40 GMT