"Mon, 16 Feb 1970 07:54:37"
Convert date and time to unixtime.
Another datetime format string at UTC
YYYYMMDD
19700216
Only TIME
07:54:37
General datetime
1970-02-16 07:54:37Z
For Database
1970-02-16 07:54:37
For HTTP1.1
Mon, 16 Feb 1970 07:54:37 GMT