Simcoe Day is a public holiday celebrated in Ontario, Canada, on the first Monday in August. It honors John Graves Simcoe, the first Lieutenant Governor of Upper Canada, who played a significant role in the province's early development. The day is marked by various community events, including parades, festivals, and outdoor activities. Many people use Simcoe Day as an opportunity to enjoy the summer weather with family and friends. Parks and recreational areas often host special events, and local businesses may offer promotions. The holiday is a time for residents to reflect on Ontario's history and celebrate their community.