"Mon, 09 Feb 1970 19:45:57"
Convert date and time to unixtime.
Another datetime format string at UTC
YYYYMMDD
19700209
Only TIME
19:45:57
General datetime
1970-02-09 19:45:57Z
For Database
1970-02-09 19:45:57
For HTTP1.1
Mon, 09 Feb 1970 19:45:57 GMT