"Fri, 02 Jan 1970 14:56:47"
Convert date and time to unixtime.
Another datetime format string at UTC
YYYYMMDD
19700102
Only TIME
14:56:47
General datetime
1970-01-02 14:56:47Z
For Database
1970-01-02 14:56:47
For HTTP1.1
Fri, 02 Jan 1970 14:56:47 GMT