I see. From the other comments, I'd say at least in Spain it works like in Italy, and it is best described by the first sentences of the two Wikipedia articles:

I see. From the other comments, I'd say at least in Spain it works like in Italy, and it is best described by the first sentences of the two Wikipedia articles: All Saints' Day, also known as All Hallows' Day, Hallowmas, the Feast of All Saints, or Solemnity of All Saints, is a Christian solemnity celebrated in honour of all the saints of the church, whether they are known or unknown. All Souls' Day, also known as the Commemoration of All the Faithful Departed and the Day of the Dead, is a day of prayer and remembrance for the souls of those who have died, which is observed by Latin Catholics and other Christian denominations annually on November 2.