"Fri, 02 Jan 1970 20:43:35"
Convert date and time to unixtime.
Another datetime format string at UTC
YYYYMMDD
19700102
Only TIME
20:43:35
General datetime
1970-01-02 20:43:35Z
For Database
1970-01-02 20:43:35
For HTTP1.1
Fri, 02 Jan 1970 20:43:35 GMT