I havenèt use my airbnb account for 7 months. Now I would like to put the new information - that the appartment is available in March, 2017. What is the procedure to follow, please.
Unblock your calendar for the dates it is available, @Ekaterina4. Edit your listing to make sure everything is up to date. That will get it going. And just a bit of advice: Change your cover picture so it is more representative of the space and shows up well when someone is searching your area.
Sorry, @Ekaterina4, I just realized you may have been asking HOW to unblock your calendar. If that is so, go to Dashboard -> Your Listing -> Calendar and More, and click on the dates you want to unblock. You can click on one date and then drag the borders on each side to encompass a week, a month, etc. That will save you having to do a day at a time.