"Mon, 02 Feb 1970 20:43:16"
Convert date and time to unixtime.
Another datetime format string at UTC
YYYYMMDD
19700202
Only TIME
20:43:16
General datetime
1970-02-02 20:43:16Z
For Database
1970-02-02 20:43:16
For HTTP1.1
Mon, 02 Feb 1970 20:43:16 GMT