@Colette308 Airbnb does not offer a flexible-date-search feature. So here's the workaround:
1. Do a non-date-specific search for homes in your destination, using the available filters to narrow down the options to your specifications.
2. Save all of the properties that look appealing to your wishlist (it's the Heart icon in the upper right)
3. Click on your profile icon and select "Saved" to view your wishlist. This creates a specialized search form where you can search only your selected properties for available dates.
This isn't quite what you were hoping for, but if you have a list of suitable properties saved, you can always use the wishlist to do a quick search for the dates you want to travel.