"Fri, 02 Jan 1970 09:23:20"
Convert date and time to unixtime.
Another datetime format string at UTC
YYYYMMDD
19700102
Only TIME
09:23:20
General datetime
1970-01-02 09:23:20Z
For Database
1970-01-02 09:23:20
For HTTP1.1
Fri, 02 Jan 1970 09:23:20 GMT