"Tue, 17 Feb 1970 00:03:01"
Convert date and time to unixtime.
Another datetime format string at UTC
YYYYMMDD
19700217
Only TIME
00:03:01
General datetime
1970-02-17 00:03:01Z
For Database
1970-02-17 00:03:01
For HTTP1.1
Tue, 17 Feb 1970 00:03:01 GMT