Holiday on August 5, 2026 — Colorado Day will mark the state's 150th anniversary
August 5 is Colorado Day in the United States—a holiday commemorating the anniversary of the state’s admission to the Union. It was on August 5, 1876, that President Ulysses S. Grant signed the proclamation admitting Colorado to the United States. In 2026, the state will mark a special milestone—the 150th anniversary of its admission as a state.
Colorado Day falls on August 5 every year. The date is linked not only to a historical event but also to the moment when Colorado officially became the 38th state of the United States. In 2026, the holiday is particularly special, as it marks exactly 150 years since Colorado joined the Union. That is why this year’s events are on a larger scale. Official celebrations are planned, in particular, at the State Capitol in Denver.
Interestingly, under Colorado law, Colorado Day is linked to the anniversary of the state’s admission to the United States. Specific provisions define it as a day when the public can honor this historic event.
How Colorado Became a State
Colorado’s history as an American territory began long before 1876. In 1861, the U.S. Congress established the Colorado Territory. Prior to that, the region had experienced a turbulent period of Western expansion, linked in particular to gold mining and an influx of settlers. The path to statehood proved to be a long one. Residents of the territory made several attempts to have it admitted to the United States as a separate state. Attempts were made in 1864, 1865, and 1876, and only the last of these was successful.
In 1876, the residents of Colorado adopted their own constitution. It was approved by voters on July 1, and on August 5, the territory attained statehood. On the same day, President Ulysses S. Grant signed the proclamation admitting Colorado to the Union. Colorado became the 38th state of the United States. Because the state joined the Union in the centennial year of the American Declaration of Independence, it earned the nickname “Centennial State.”
Why Colorado Day Is Celebrated
The main purpose of Colorado Day is to commemorate the historic moment when the territory gained full statehood. For residents of the region, it is a kind of birthday for Colorado. It provides an opportunity not only to commemorate the date in 1876 but also to reflect on how the state has changed over the following decades.
The holiday is also linked to the history of local self-government and the state’s development. After gaining statehood, Colorado began to establish its own system of government. The first elections took place on October 3, 1876, and the first session of the Colorado General Assembly was held on November 1 of that same year. Today, Colorado Day is not just about political history. The focus is also on the state’s culture, its natural features, cities, people, and historical figures.
How the Holiday Is Celebrated
Colorado Day is usually celebrated without a set itinerary. People can participate in local historical events, visit museums, exhibitions, and landmarks, learn about the state’s history, or simply spend the day with their families. This year, special attention is being paid to the anniversary. On August 5, 2026, an official program marking Colorado’s 150th anniversary is scheduled to take place at the State Capitol in Denver. It will include a flag ceremony, speeches, a reenactment of the proclamation granting the state its status, and the traditional cutting of the celebratory cake.
The program will not be limited to official speeches. The State Capitol will host exhibitions, dance performances, the ringing of the Liberty Bell, art displays, and special anniversary projects. A separate exhibition will showcase Colorado’s past, present, and future. The 2026 celebrations are also part of the larger “America 250—Colorado 150” program, which combines the state’s 150th anniversary with the 250th anniversary of the United States. Therefore, this year’s Colorado Day holds special significance both for the state itself and for America’s collective historical memory.
Interesting Facts About Colorado
Colorado did not always have a single permanent seat of government. In the early years of the territory, three cities took turns serving as the territorial capital: Colorado City, Golden, and Denver. It wasn’t until 1881 that residents voted to make Denver the permanent seat of the state government. Here’s another interesting fact related to the name of the future state. Before the territory was established, various names were proposed, including Colona, Osage, and Idaho. Ultimately, the name Colorado stuck.
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The state’s history is closely tied to the gold rush. It was the search for gold that became one of the reasons for the rapid influx of people into this region in the 19th century. New settlements sprang up near the mining sites, and along with them, trade, transportation, and future cities developed. Another important feature of Colorado is its symbolism. The state flag features the colors blue, white, red, and gold. According to the official explanation, these colors are associated with the region’s natural features: the blue sky, sunlight, red earth, and snow-capped mountains.
What Colorado Day Means Today
Over the past 150 years, Colorado has changed dramatically. The territory, once known primarily for its gold prospectors and mountain settlements, has transformed into one of the most well-known U.S. states, with major cities, a thriving economy, and popular tourist destinations. That’s why Colorado Day is an opportunity for locals to reflect not only on August 5, 1876, but also to honor the people who built the cities, settled the mountainous regions, fostered the culture, and shaped the state’s modern identity.
In 2026, this date holds special symbolic significance. Colorado will celebrate its 150th anniversary, and the main festivities will transform an ordinary Colorado Day into a grand anniversary celebration. That is why, on August 5, 2026, the state will reflect on its history, host exhibitions and cultural events, and simply celebrate the birthday of Colorado—the state that joined the United States in 1876 and became the nation’s 38th state.
