1. Vermont Becomes a State: On May 27, 1791, Vermont became the 14th state to join the Union. The state had originally declared its independence from New York and then operated as a republic until it was admitted as a state.

2. Birth of Chester A. Arthur: Chester A. Arthur, the 21st President of the United States, was born in Fairfield, Vermont on May 27, 1829. He served from 1881 to 1885 and is primarily remembered for his civil service reforms.

3. Death of John Dewey: John Dewey, an influential American philosopher, died on May 27, 1952, in his home in Vermont. Dewey was known for his pragmatist philosophy of education and his belief in the importance of democracy.

4. Vermont's First State Park: On May 27, 1921, Vermont's first state park, Mount Philo State Park, was dedicated. The park is located in Charlotte and offers scenic views of Lake Champlain.

5. Memorial Day: May 27, 2019, was Memorial Day, a federal holiday honoring those who have died while serving in the U.S. military. Vermont has a strong tradition of military service, and many communities hold parades and ceremonies to commemorate the day.