I have a promotion that I'd like to run for a product. I want to have a Date Range field, so I can easily see in the calendar when the promotion is running. I'd also like to use the Due Date field for the date I must finalize the promotion by.

Currently I'm using two Custom Date Fields ("Begin Date" and "End Date", as using Start Date affects the Due Date field) and they only appear in the calendar on the dates specified, rather than spanning that measure of time. I think being able to visualize the range of time in the Calendar would be extremely useful, as I would be able to see more easily if two promotions might overlap.