It would be nice to future maintain product sales anniversaries dates from the product master record for purpose of sales trade agreements. Not including product sales anniversaries dates, user may not easily compose sales discount agreements, based on product master record default sales anniversary dates proposals. The user may conventionally process trade agreements on future dates or track sale anniversary dates outside the system. Including a product sales anniversary date from the product master record, the user may potentially be able in the future to process product sales anniversary date (s) based on inclusivity period range for the month or the year.