"Fri, 02 Jan 1970 23:35:48"
Convert date and time to unixtime.
Another datetime format string at UTC
YYYYMMDD
19700102
Only TIME
23:35:48
General datetime
1970-01-02 23:35:48Z
For Database
1970-01-02 23:35:48
For HTTP1.1
Fri, 02 Jan 1970 23:35:48 GMT