Armed Forces Day, also known as Tatmadaw Day, is a public holiday in Myanmar (Burma), celebrated annually on 27th March. This day commemorates the historic event in 1945 when the Burmese National Army rose up in rebellion against the Japanese occupiers during World War II. It is a day to honor the military forces of the nation and the role they play in maintaining peace and security.

Armed Forces Day in Myanmar is marked by a variety of celebrations, ceremonies, and military parades. These events serve to showcase the strength and might of the military and are normally met with great enthusiasm by the people. This day also serves as an occasion to pay tribute to veterans and current members of Myanmar's military forces. Various other cultural and community activities also take place, which unite the people in a shared sense of national identity and pride.

Despite the celebrations, Armed Forces Day has also been met with criticism and protests due to the country's complex political history and the role the military has played in it. While the day is intended to reflect unity and national pride, it has also been a reminder of the power the military holds in the country. Despite this, Armed Forces Day remains an important date in Myanmar's calendar and continues to provoke thought and reflection on the nation's history and future.