Double Ten Day is the National Day of the Republic of China.(國慶日)
It commemorates the start of the Wuchang Uprising of October 10, 1911, which led to the collapse of the Qing Dynasty in China and establishment of the Republic of China on January 1, 1912. After the end of the Chinese civil war, the KMT fled from China to Taiwan and continued to observe this day.
At times, the government will hold a military parade in Taipei to commemorate the day. But, this is not done on a set annual schedule.
Double Ten Day is always a national holiday for both offices and schools in Taiwan.