"Fri, 02 Jan 1970 15:05:39"
Convert date and time to unixtime.
Another datetime format string at UTC
YYYYMMDD
19700102
Only TIME
15:05:39
General datetime
1970-01-02 15:05:39Z
For Database
1970-01-02 15:05:39
For HTTP1.1
Fri, 02 Jan 1970 15:05:39 GMT