"Mon, 23 Mar 1970 07:12:32"
Convert date and time to unixtime.
Another datetime format string at UTC
YYYYMMDD
19700323
Only TIME
07:12:32
General datetime
1970-03-23 07:12:32Z
For Database
1970-03-23 07:12:32
For HTTP1.1
Mon, 23 Mar 1970 07:12:32 GMT