You can make a room type available for check-in on certain days only, for example Saturdays.
- Go to Settings -> Availability -> Stay restrictions and click “New restriction”.
- Under “Blocked days”, choose the days of the week when check-in and/or check-out should be closed, for example, all days except Saturday.
- Check the box “Check-in not allowed”.
- Unless you specify a room type, this setting will apply to all room types.