Hallowmas Season takes place from October 31 until November 02, 2021. This season encompasses All Saints' Eve, All Saints' Day and All Souls' Day. All three days are observed by Western Christians and the season takes place annually. The dates of all those religious observances were established in the 8th century. It is also known as the Triduum of Hallowtide, Allsaintstide, Hallowtide, or Allhallowtide. Hallowmas Season is a time to remember those who died, including saints and martyrs. Hallowmas Season may not be confused with Hallowmas, which is a synonym for All Saints' Day, first used William Shakespeare.