The birthday of the reigning monarch is a national holiday in the Kingdom of Netherlands. Since 2014, it has been celebrated on April 27, marking the birth of King Willem-Alexander. The holiday is referred to as King's Day (Koningsdag).
National Veterans' Day is an official remembrance day in Finland that honors all the war veterans. Is not an official flag day, but the Finnish flag is still flown on the occasion. National Veterans' Day is observed on April 27 because on this day in 1945 World War II ended in Finland.