1. The Battle of Glorieta Pass took place in New Mexico on April 1, 1862. This Civil War battle was important for the Union victory in the West, as it prevented Confederate forces from advancing further into New Mexico and ultimately helped seal the fate of the Confederacy.

2. On April 1, 1885, New Mexico became the first state in the United States to officially adopt a state fossil: the Coelophysis. These small, carnivorous dinosaurs were discovered in the Ghost Ranch area of northern New Mexico and have since become a prominent part of the state's paleontological history.

3. The New Mexico State Penitentiary Riot began on April 1, 1980. This violent uprising, which lasted for several days, resulted in the deaths of 33 inmates and the injury of over 200 others. The riot was a result of overcrowding, poor living conditions, and tensions between different inmate groups.

4. In 2000, the first same-sex marriage license was issued in the United States in the small town of Taos, New Mexico, on April 1. The couple, Jennifer Pizer and Julie Tobias, were denied a marriage license twice before finally being granted one by a sympathetic county clerk.

5. On April 1, 2019, New Mexico became the 47th state to legalize recreational marijuana use for adults. The law allows adults over the age of 21 to possess up to 2 ounces of marijuana, and to grow up to 6 plants at home for personal use. The law also includes provisions for expungement of certain past marijuana convictions.