"Fri, 13 Feb 1970 14:12:08"
Convert date and time to unixtime.
Another datetime format string at UTC
YYYYMMDD
19700213
Only TIME
14:12:08
General datetime
1970-02-13 14:12:08Z
For Database
1970-02-13 14:12:08
For HTTP1.1
Fri, 13 Feb 1970 14:12:08 GMT