"Tue, 17 Feb 1970 00:52:17"
Convert date and time to unixtime.
Another datetime format string at UTC
YYYYMMDD
19700217
Only TIME
00:52:17
General datetime
1970-02-17 00:52:17Z
For Database
1970-02-17 00:52:17
For HTTP1.1
Tue, 17 Feb 1970 00:52:17 GMT