Hi @Fiona615
Yes, you can do this by turning on Pro Tools and creating a Rule Set that includes a 2-day min and/or checkin/checkout restrictions. Just be sure you double check the Rule Set is working correctly after creating it by trying to book as guest; they can be a bit tricky. Apply your Rule Set to only the days you want on your Calendar. This overrides your default of 1 night ONLY for the dates you apply the Rule Set to. Dates without a Rule Set applied will default to your 1night min stay on your regular calendar. Below is a Guide with Screen Shots on how to do that:
Use Pro Tools & Rule Sets For Min Stay/Check-in & Check-Out
https://community.withairbnb.com/t5/Community-Guides/Guide-How-to-Use-Pro-Tools-amp-Rule-Sets-to-Cre...