Hello @Will31,
On the website:
go to your calendar
select "Availability settings" in the black bar at the top
you will then see a box for "Minimum stay" where you can set the minimum number of nights a guest can book.
If you want to set a different minimum stay for specific months or dates then select the "Add another requirement" link.
On the app:
go to your calendar
select the wheel icon in the top right
then tap the "Min and max stay" box at the bottom
If you want to set a different minimum stay for specific months or dates then select the "Add more requirements" link.
Steve.