In order to remove the blocked dates and make your property available, there are two ways:
Step 1: Calendar -> Overall Occupancy Calendar
Step 2: Click on the blocked date and select “Edit.”
Step 3:Then delete the blocked date.
Or go to Tasks -> Maintenance-> Blocked Dates. Find the property and make sure the blocked dates are the ones you want to delete. Then click on the three dots at the end of the row and Delete or Disable the blocked dates. The difference between deleting and disabling blocked-dates is is in keeping the data. If you disable a blocked-date, the data of the blocked-date remains in blocked-date index and you can enable it again, but if you delete it you can’t make it back. Also, disabling is used for iCal blocked-dates.