"Fri, 06 Feb 1970 18:13:23"
Convert date and time to unixtime.
Another datetime format string at UTC
YYYYMMDD
19700206
Only TIME
18:13:23
General datetime
1970-02-06 18:13:23Z
For Database
1970-02-06 18:13:23
For HTTP1.1
Fri, 06 Feb 1970 18:13:23 GMT