"Thu, 05 Feb 1970 19:45:44"
Convert date and time to unixtime.
Another datetime format string at UTC
YYYYMMDD
19700205
Only TIME
19:45:44
General datetime
1970-02-05 19:45:44Z
For Database
1970-02-05 19:45:44
For HTTP1.1
Thu, 05 Feb 1970 19:45:44 GMT