You can set the minimum and maximum number of days that are allowed. For example, you can require a minimum stay of 7 nights.
- Go to Settings -> Restrictions -> Bookable days and click “Define a new time period”.
- Indicate the date range when this setting should apply.
- The setting will apply to all room types, unless you choose a specific room type.
- Select the minimum and maximum number of nights that can be booked.
The above is also explained in this video: