"Mon, 09 Feb 1970 12:03:38"
Convert date and time to unixtime.
Another datetime format string at UTC
YYYYMMDD
19700209
Only TIME
12:03:38
General datetime
1970-02-09 12:03:38Z
For Database
1970-02-09 12:03:38
For HTTP1.1
Mon, 09 Feb 1970 12:03:38 GMT