"Mon, 09 Feb 1970 04:42:33"
Convert date and time to unixtime.
Another datetime format string at UTC
YYYYMMDD
19700209
Only TIME
04:42:33
General datetime
1970-02-09 04:42:33Z
For Database
1970-02-09 04:42:33
For HTTP1.1
Mon, 09 Feb 1970 04:42:33 GMT