1. Birth of Ethan Allen: April 23 marks the birth anniversary of Ethan Allen, a prominent figure in Vermont's history. He is best known for leading the Green Mountain Boys in the American Revolutionary War and for his role in the founding of the Vermont Republic.

2. Vermont becomes a state: On April 23, 1791, Vermont became the 14th state to join the United States of America. The state was previously an independent republic that had declared its independence from Great Britain in 1777.

3. First Vermont State Flag: On April 23, 1923, the first Vermont state flag was adopted. The flag features a blue field with the state coat of arms in the center and a pine tree on each side.

4. Vermont's first same-sex marriage: On April 23, 2009, Vermont became the first state in the United States to legalize same-sex marriage through legislative action. This marked a significant moment in the state's history and paved the way for other states to follow suit.

5. Restoration of Vermont State House: On April 23, 1992, the restored Vermont State House was reopened to the public after a three-year, $19 million renovation project. The State House, located in Montpelier, is an iconic landmark that houses the offices of the governor, lieutenant governor, and state legislature.