"Thu, 05 Feb 1970 21:42:03"
Convert date and time to unixtime.
Another datetime format string at UTC
YYYYMMDD
19700205
Only TIME
21:42:03
General datetime
1970-02-05 21:42:03Z
For Database
1970-02-05 21:42:03
For HTTP1.1
Thu, 05 Feb 1970 21:42:03 GMT