"Mon, 16 Feb 1970 11:25:48"
Convert date and time to unixtime.
Another datetime format string at UTC
YYYYMMDD
19700216
Only TIME
11:25:48
General datetime
1970-02-16 11:25:48Z
For Database
1970-02-16 11:25:48
For HTTP1.1
Mon, 16 Feb 1970 11:25:48 GMT