Which November 1 Christian holy day is listed as related to Day of the Dead?

The November 1 Christian holy day related to Day of the Dead is All Saints' Day.

All Saints’ Day honors all saints, including both famous canonized figures and holy people whose names are not individually known. In Western Christianity, it falls on November 1 and forms part of Allhallowtide, the season that also includes Halloween on October 31 and All Souls’ Day on November 2.

Day of the Dead is observed mainly on November 1 and 2, although local calendars vary. Its dates overlap with this Christian season, and the holiday developed through a mixture of Indigenous Mexican traditions and Catholic practices introduced during Spanish colonization. The overlap does not mean the two observances are identical: All Saints’ Day focuses on the saints, while Day of the Dead centers on remembering deceased family members and friends.

A common mix-up is All Souls’ Day, which is the November 2 observance dedicated to the faithful departed. All Hallows’ Eve is the preceding October 31 vigil. Together, these neighboring dates help explain why Day of the Dead is listed in relation to All Saints’ Day.