This question refers to a past date (May 2024). However, for a future-facing context in 2026, the general booking rule for Disneyland Paris is that hotel and ticket packages usually open 8 to 12 months in advance. For a May trip, bookings typically open the previous summer (July or August). If you were looking to book for May 2024 specifically, that window would have opened around July 2023. Disneyland Paris often uses a "dynamic pricing" model where booking earlier generally secures the lowest rates and the best availability for themed hotels like the Disneyland Hotel or Disney Hotel New York – The Art of Marvel. For those booking "tickets only" without a hotel, the window is shorter, usually opening 3 to 6 months in advance. It is always advisable to check the official "Price Estimator" tool on their website, which allows you to see the cheapest dates for your specific month across a rolling 12-month calendar.