1. On March 21, 1867, the Vermont State Legislature passed an act that established the state's first fish hatchery. The hatchery, located in the town of St. Johnsbury, was created to breed and stock the state's rivers and lakes with fish.

2. March 21, 1969, saw the first-ever prison riot in Vermont's history. Inmates at the Vermont State Prison in Windsor staged a revolt that lasted for three days, resulting in multiple injuries, extensive property damage, and several reforms to the state's correctional system.

3. On March 21, 1778, the Vermont Republic adopted its first constitution, becoming the first territory in America to outlaw slavery. The constitution also established freedom of religion and required public schools to be accessible throughout the state.

4. The Vermont State House, the state's, was completed on March 21, 1838. The building, located in Montpelier, has been in continuous use as the seat of Vermont's government since its construction and is widely regarded as a masterpiece of Greek Revival architecture.

5. March 21, 1933, saw the birth of Vermont native and legendary comedian Fred Tuttle. Tuttle achieved national fame in 1998 when he ran for and won the Republican nomination for the seat of Vermont's lone representative in Congress, ultimately losing the general election to incumbent Bernie Sanders.