The reduced operating hours go into effect on Sept. 8.
Disney had previously said it would cut $900 million in planned capital expenditures due to the COVID-19 pandemic.
With COVID-19 cases and test positivity rates rising in Central Florida, Disney World will reopen its theme parks on July 11.
Theme park reservations will become available on June 22 for guests staying at a Disney World hotel.
The festival will start on July 15 in modified form, with fewer food booths and no "Eat to the Beat" concerts.
Disney said it has yet to decide whether to cancel Magic Kingdom's other big seasonal event, Mickey's Very Merry Christmas Party
Portions of Disney World’s unionized workforce are being told to prepare to return to work, according to social media posts from union leaders.
March 15 was the last day for the Matsuriza drummers in Epcot's Japan pavilion and the British Revolution band in the U.K. pavilion.
Just like other theme parks, Universal Orlando can't escape questions about its response to the coronavirus outbreak.