National Unity Day (Belarus) (since 2021)

The National Unity Day is a state holiday in Belarus celebrated on September 17 and marks the unification of the Western Belarus and Eastern Belarus which happened on September 17, 1939, the day of the Soviet invasion of Poland during World War II. It was established by the June 7, 2021 Decree No. 206 by President of Belarus Alexander Lukashenko. The day of the holiday remains a working day.

September 17 is the 260th day of the year in the Gregorian calendar; 105 days remain until the end of the year.