"Tue, 17 Feb 1970 00:19:48"
Convert date and time to unixtime.
Another datetime format string at UTC
YYYYMMDD
19700217
Only TIME
00:19:48
General datetime
1970-02-17 00:19:48Z
For Database
1970-02-17 00:19:48
For HTTP1.1
Tue, 17 Feb 1970 00:19:48 GMT