"Fri, 02 Jan 1970 09:15:42"
Convert date and time to unixtime.
Another datetime format string at UTC
YYYYMMDD
19700102
Only TIME
09:15:42
General datetime
1970-01-02 09:15:42Z
For Database
1970-01-02 09:15:42
For HTTP1.1
Fri, 02 Jan 1970 09:15:42 GMT