"Wed, 04 Feb 1970 23:30:52"
Convert date and time to unixtime.
Another datetime format string at UTC
YYYYMMDD
19700204
Only TIME
23:30:52
General datetime
1970-02-04 23:30:52Z
For Database
1970-02-04 23:30:52
For HTTP1.1
Wed, 04 Feb 1970 23:30:52 GMT