This page allows you to define dates when arrival and/or departures are not allowed. Note: if you want to restrict arrivals and/or departures for specific weekdays of a season (or of entire year), go to seasonal settings
The CSV file has one header row and contains 2 columns: the first one is the date (using the format selected for your site or YYYY-MM-DD), the second column is the restriction type: use the value of 1 if rentals cannot start on this date, 2 if rentals cannot end on this date or 3 if rentals cannot start or end on this date.