Find the Shift of a given Time Stamp

Hi All,

How to build a transaction that takes input of a DateTime Stamp Say 2014-06-27T09:30:00 and find if it is of 1st shift or 2nd shift or 3rd shift ?

I am assuming Time range like this.

First Shift  -  2014-06-27T08:00:00 to 2014-06-27T016:00:00

Second Shift  -  2014-06-27T16:00:00 to 2014-06-27T024:00:00

Third Shift  -  2014-06-27T00:00:00 to 2014-06-27T008:00:00

How can we build a transaction for the above conditions ? Any suggestions ?

Regards,

Sriram