"Wed, 11 Feb 1970 19:39:35"
Convert date and time to unixtime.
Another datetime format string at UTC
YYYYMMDD
19700211
Only TIME
19:39:35
General datetime
1970-02-11 19:39:35Z
For Database
1970-02-11 19:39:35
For HTTP1.1
Wed, 11 Feb 1970 19:39:35 GMT