Every March, Denverites celebrate the town’s original area code, also known as 303 Day. Various vendors around the city host events to observe the day each year, which is now called “Buy Colorado Day.”
In the past, local radio stations hosted concerts that showcased local bands, beers, and provisions. In 2025, 303 Day became “Buy Colorado Day”, which is aimed at supporting local Colorado businesses. This year’s 303 Day falls on Tuesday, March 3rd, 2026.
Buy Colorado Day
Whether you celebrate with others at a designated concert or on your own, 303 Day is the perfect time to support local retailers and artists all day long.
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Details
Address: Denver, CO
Date: Tuesday, March 3, 2026
Cost: Varies by event