All Saints Day, also known as All Hallows' Day, is a solemn Christian festival celebrated on November 1 to honor all the saints of the church, both known and unknown. It is a day to remember those who have attained heaven and to reflect on the communion of saints, acknowledging the spiritual connection between the living and the dead. In many traditions, it serves as a bridge leading directly into All Souls' Day on November 2, where believers pray for all departed souls.