"Mon, 09 Feb 1970 14:45:54"
Convert date and time to unixtime.
Another datetime format string at UTC
YYYYMMDD
19700209
Only TIME
14:45:54
General datetime
1970-02-09 14:45:54Z
For Database
1970-02-09 14:45:54
For HTTP1.1
Mon, 09 Feb 1970 14:45:54 GMT