"Fri, 02 Jan 1970 02:27:48"
Convert date and time to unixtime.
Another datetime format string at UTC
YYYYMMDD
19700102
Only TIME
02:27:48
General datetime
1970-01-02 02:27:48Z
For Database
1970-01-02 02:27:48
For HTTP1.1
Fri, 02 Jan 1970 02:27:48 GMT