"Fri, 20 Feb 1970 23:32:25"
Convert date and time to unixtime.
Another datetime format string at UTC
YYYYMMDD
19700220
Only TIME
23:32:25
General datetime
1970-02-20 23:32:25Z
For Database
1970-02-20 23:32:25
For HTTP1.1
Fri, 20 Feb 1970 23:32:25 GMT