All Saints' Day is observed in Sweden and Finland on the Saturday between October 31 and November 6, differing from the worldwide celebration on November 1. This religious holiday honors all saints, both known and unknown, and is marked as a Holy Day of Obligation for Catholics, requiring attendance at Mass unless there is a valid reason for absence. In Sweden and Finland, a notable custom involves lighting candles and visiting the graves of deceased relatives, with candles placed on graves during All Saints' Eve. The Mass is conducted by priests in white vestments, similar to practices in other European countries. This tradition reflects the shared cultural and religious significance of the day across various nations.