"Fri, 02 Jan 1970 00:40:25"
Convert date and time to unixtime.
Another datetime format string at UTC
YYYYMMDD
19700102
Only TIME
00:40:25
General datetime
1970-01-02 00:40:25Z
For Database
1970-01-02 00:40:25
For HTTP1.1
Fri, 02 Jan 1970 00:40:25 GMT