Dates For Booking

Hello, I am looking to book 5 nights at the Arte side for 2, I am looking for the cheapest prices for this summer and have come across the dates Aug 30th - Sep 4th for 5 nights and it seems to be the cheapest by a few hundred. I am curious if anyone knows why this may be the cheapest day in the summer (if there is any real reason to avoid these dates. Thank you!