If you want a custom calendar form know that it's a fair bit of design work, requiring 42 textboxes for dates and then coding to a) determine which ones to show and b) what numbers to give them. Then there's controls for doing things like moving forward/backward or combos to pick year/month and redrawing the calendar each time you move the year/month. What you want will compound the difficulty given that you'll have to somehow assign 2 chosen dates to something (variables or controls) instead of just 1. If there is a less complicated method with a custom calendar I hope someone posts about it.
I agree - 2 textboxes designed to show start and end dates.
The more we hear silence, the more we begin to think about our value in this universe.
Paraphrase of Professor Brian Cox.