Effective Date for Forecast Generation

Hi All

We have some business requirements for Demantra for which we are looking for solution.

We have a bunch of finished items for which peak sells are seasonal. That means although we sell them throughout the year, the majority of the sells happen in few specific months ( Summer, Spring). Accordingly, we want to plan them only for those few months and interested for the forecasting. Remaining months, we dont want their forecast to appear for the plan; in other words, we are happy with zero forecasts for those items in off season months.

Obviously, we understand there is a "do not do" forecast flag there, but that flag can not work on a time basis. Ideally, we would like to have same item