"Mon, 16 Feb 1970 07:12:35"
Convert date and time to unixtime.
Another datetime format string at UTC
YYYYMMDD
19700216
Only TIME
07:12:35
General datetime
1970-02-16 07:12:35Z
For Database
1970-02-16 07:12:35
For HTTP1.1
Mon, 16 Feb 1970 07:12:35 GMT