What a beautiful listing you have, @Guy-Et-Popy0! I see you are just starting with Air BNB. You are not using Smart Pricing, which is good, so you can edit your price directly on your calendar. You can do it for any time period by highlighting the days on your calendar and changing the price. Be sure to save the changes.
While you are a new listing, Air BNB will give you temporary preference in the search function so it is wise to capitalize on that temporary boost so you can have guests and guest reviews. Also, you could temporarily add a sentence at the beginning of the description in which you note the November-December price reflects a 10% discount. Be sure to remove the sentence in December.
I wish you well in this business.