"Mon, 05 Jan 1970 18:16:32"
Convert date and time to unixtime.
Another datetime format string at UTC
YYYYMMDD
19700105
Only TIME
18:16:32
General datetime
1970-01-05 18:16:32Z
For Database
1970-01-05 18:16:32
For HTTP1.1
Mon, 05 Jan 1970 18:16:32 GMT