"Mon, 05 Jan 1970 18:14:41"
Convert date and time to unixtime.
Another datetime format string at UTC
YYYYMMDD
19700105
Only TIME
18:14:41
General datetime
1970-01-05 18:14:41Z
For Database
1970-01-05 18:14:41
For HTTP1.1
Mon, 05 Jan 1970 18:14:41 GMT