"Fri, 06 Feb 1970 19:45:48"
Convert date and time to unixtime.
Another datetime format string at UTC
YYYYMMDD
19700206
Only TIME
19:45:48
General datetime
1970-02-06 19:45:48Z
For Database
1970-02-06 19:45:48
For HTTP1.1
Fri, 06 Feb 1970 19:45:48 GMT