"Mon, 09 Feb 1970 12:02:23"
Convert date and time to unixtime.
Another datetime format string at UTC
YYYYMMDD
19700209
Only TIME
12:02:23
General datetime
1970-02-09 12:02:23Z
For Database
1970-02-09 12:02:23
For HTTP1.1
Mon, 09 Feb 1970 12:02:23 GMT