"Fri, 09 Jan 1970 05:56:48"
Convert date and time to unixtime.
Another datetime format string at UTC
YYYYMMDD
19700109
Only TIME
05:56:48
General datetime
1970-01-09 05:56:48Z
For Database
1970-01-09 05:56:48
For HTTP1.1
Fri, 09 Jan 1970 05:56:48 GMT