22 Best 2000s Halloween Costume Ideas Outfits Inspired by the 00s Warning: Decades Day is coming on Tuesday! Students and staff, dress in your best (or worst) decade inspired outfits. Join the chaos and show your school spirit! Discover 77 Early 2000's outfits and 2000s fashion ideas aaliyah style, 90s fashion, 90s hip hop fashion and more What Will People Wear at 2000s Costume Parties? The New York Times The Mustang 2000s Day Dress up with us for Y2K Day! #y2k #2000s #dressup #school #spiritweek #fashion #fyp #fyf #viral