"Thu, 05 Feb 1970 14:11:42"
Convert date and time to unixtime.
Another datetime format string at UTC
YYYYMMDD
19700205
Only TIME
14:11:42
General datetime
1970-02-05 14:11:42Z
For Database
1970-02-05 14:11:42
For HTTP1.1
Thu, 05 Feb 1970 14:11:42 GMT