"Wed, 11 Feb 1970 22:40:48"
Convert date and time to unixtime.
Another datetime format string at UTC
YYYYMMDD
19700211
Only TIME
22:40:48
General datetime
1970-02-11 22:40:48Z
For Database
1970-02-11 22:40:48
For HTTP1.1
Wed, 11 Feb 1970 22:40:48 GMT