@NJ99221 : The change is only temporary to celebrate 30 years of Disneyland's Paris Resort. It is for Women's History Month apparently. This is not the first time she has worn trousers. In 2019 the cartoon made her debut as "Captain Minnie" on board a Disney Cruise Line, sporting a white pair of sailor trousers.
Minnie Mouse was first introduced to comic book readers almost 100 years ago as the love interest of Walt Disney's Mickey Mouse character. In 1942 it was revealed that her full name is Minerva.