"Mon, 16 Mar 1970 12:02:48"
Convert date and time to unixtime.
Another datetime format string at UTC
YYYYMMDD
19700316
Only TIME
12:02:48
General datetime
1970-03-16 12:02:48Z
For Database
1970-03-16 12:02:48
For HTTP1.1
Mon, 16 Mar 1970 12:02:48 GMT