The hours vary depending on which Park you're visiting but the normal hours are usually from 8 a.m. until 11 p.m. on Sundays as well
Get the Disney app and it will tell you about times of openings and closings at each park and which days.
It also varies based on where you stay, in park resorts have early access.
It depends on the day and the park. They will usually open between 8-9am and close around 9pm with the exception of Magic Kingdom closing at 12am on the weekdays. You can get accurate operating hours on the My Disney Experience app or by going to the Disney website and search for park hours.
You can sign up for the my disney experience account because the hours always change based on time of year
Go later on less people and less hot
7:30-10 are the best time to go
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