"Mon, 05 Jan 1970 15:07:48"
Convert date and time to unixtime.
Another datetime format string at UTC
YYYYMMDD
19700105
Only TIME
15:07:48
General datetime
1970-01-05 15:07:48Z
For Database
1970-01-05 15:07:48
For HTTP1.1
Mon, 05 Jan 1970 15:07:48 GMT