"Wed, 11 Feb 1970 12:33:33"
Convert date and time to unixtime.
Another datetime format string at UTC
YYYYMMDD
19700211
Only TIME
12:33:33
General datetime
1970-02-11 12:33:33Z
For Database
1970-02-11 12:33:33
For HTTP1.1
Wed, 11 Feb 1970 12:33:33 GMT