303 Day in Denver

Date: March 3, 2025

303 Day is a fun and spirited celebration of Denver’s original area code, making it one of the most lively Colorado things to do. On March 3, 2025, locals and visitors come together to enjoy a day filled with community pride, live music, and exciting events across the city. It’s the perfect day to wear your Rockies, Avalanche, or Broncos jersey.

A highlight of the festivities is a performance by the iconic band 3OH!3, adding energy and hometown flair to the occasion. With various vendors and activities throughout Denver, 303 Day is the perfect way to embrace the city’s unique culture and charm.

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