"Mon, 09 Feb 1970 21:42:12"
Convert date and time to unixtime.
Another datetime format string at UTC
YYYYMMDD
19700209
Only TIME
21:42:12
General datetime
1970-02-09 21:42:12Z
For Database
1970-02-09 21:42:12
For HTTP1.1
Mon, 09 Feb 1970 21:42:12 GMT