"Mon, 16 Feb 1970 00:02:56"
Convert date and time to unixtime.
Another datetime format string at UTC
YYYYMMDD
19700216
Only TIME
00:02:56
General datetime
1970-02-16 00:02:56Z
For Database
1970-02-16 00:02:56
For HTTP1.1
Mon, 16 Feb 1970 00:02:56 GMT