1. In 1865, Colorado officially became a state. After being designated as a territory by President James Buchanan in 1861, Colorado's statehood was finally recognized and accepted on February 3, 1865.

2. On February 3, 1893, the first Colorado State Capitol building was destroyed by fire. Fortunately, no one was injured, but the damage to the building was extensive. The current State Capitol building was completed in 1908.

3. On February 3, 1940, the Winter Olympics were held in Colorado for the first time. The games were held in the small mountain town of Lake Placid and attracted athletes from all over the world.

4. In 1979, Colorado experienced one of the deadliest avalanches in American history. On February 3, an avalanche in the San Juan Mountains killed seven people and injured several others.

5. On February 3, 2018, SpaceX launched its Falcon Heavy rocket for the first time. The massive rocket lifted off from the Kennedy Space Center in Florida and carried a car into space. Although the launch did not take place in Colorado, the event was watched by millions of people around the world, including many in Colorado.