>>See http://www.experts-exchange.com/Microsoft/Development/MS-SQL-Server/Q_21419664.html?qid=21419664 and
>>http://www.sqlteam.com/forums/topic.asp?TOPIC_ID=70975
>>
>>I would solve this problem by converting dates to one common year. We would need to figure out leap year too.
>
>I had thought about something similar. But it now looks that the suggestion given by David Frankenbach, and augmented by Sergey Berezniker, is simpler.

I believe my solution is better for the job, please try it. I'm converting start and end dates to the DOB year, so it would work correctly for Feb. 29.