Hi @Teresa2429
I just thought I should add that, if you choose to change the prices on the calendar itself (instead of sending a special offer), there's a risk that someone else could book some of the days at that price (especially if the guest takes long to complete the booking).
To prevent this you can set a 21-day custom minimum trip length for that specific period, just to give the guest enough time to book (or alternatively, send a special offer as it will be valid for that particular guest only).