Has anyone ever built a weeks application?

Changing the app to weeks sounds scary at this point since the app is almost done but it would take care of the YTD view for you. There would be some added training for users since they'd see weeks in monthly scenarios but would just have to explain they aren't available for input. All report time filters would have to re-evaluated and updated to ".months". the short term will be tough but the long term benefit of saving a UD is more valuable in my opinion