"Fri, 02 Jan 1970 01:20:18"
Convert date and time to unixtime.
Another datetime format string at UTC
YYYYMMDD
19700102
Only TIME
01:20:18
General datetime
1970-01-02 01:20:18Z
For Database
1970-01-02 01:20:18
For HTTP1.1
Fri, 02 Jan 1970 01:20:18 GMT