"Wed, 11 Feb 1970 18:16:17"
Convert date and time to unixtime.
Another datetime format string at UTC
YYYYMMDD
19700211
Only TIME
18:16:17
General datetime
1970-02-11 18:16:17Z
For Database
1970-02-11 18:16:17
For HTTP1.1
Wed, 11 Feb 1970 18:16:17 GMT