"Wed, 04 Feb 1970 11:04:36"
Convert date and time to unixtime.
Another datetime format string at UTC
YYYYMMDD
19700204
Only TIME
11:04:36
General datetime
1970-02-04 11:04:36Z
For Database
1970-02-04 11:04:36
For HTTP1.1
Wed, 04 Feb 1970 11:04:36 GMT