"Fri, 02 Jan 1970 00:20:12"
Convert date and time to unixtime.
Another datetime format string at UTC
YYYYMMDD
19700102
Only TIME
00:20:12
General datetime
1970-01-02 00:20:12Z
For Database
1970-01-02 00:20:12
For HTTP1.1
Fri, 02 Jan 1970 00:20:12 GMT