The choice of the day may have been intended to co-opt the pagan holiday "Feast of the Lamures," a day which pagans used to placate the restless spirits of the dead.

The holy day was eventually established on November 1 by Pope Gregory III in the mid-eighth century as a day dedicated to the saints and their relics. The May 13 celebration was subsequently abandoned.

In Ireland, the Church celebrated All Saints' Day on April 20, to avoid associating the day with the traditional harvest festivals and pagan feasts associated with Samhain, celebrated at the same time.

Following the establishment of the Frankish Empire, and following the reign of Charlemagne, the holy day, which was already celebrated on November 1, became a holy day of obligation by decree of Pope Gregory IV and Louis the Pious, who was king over a portion of Charlemagne's former empire.

Following the Protestant Reformation, many Protestants retained the holy day, although they dismissed the need to pray for the dead. Instead, the day has been used to commemorate those who have recently died, usually in the past year, and to remember the examples of those who lived holy lives.

The Catholic practice however, celebrates all those who have entered heaven, including saints who are recognized by the Church and those who are not.

Holy day customs vary around the world. In the United States, the day before is Halloween and is usually celebrated by dressing in costumes with themes of death commonly associated. Children go door-to-door in costume, trick-or-treating, that is soliciting candy from their neighbors. The holiday has lost much of its connection to its religious origins.

Although nearly everyone celebrates Halloween for the fun of the secular holiday, the following religious solemnity, is not widely practiced or acknowledged by most Americans unless they are Catholic.

In other countries, such as Portugal, Spain and Mexico, traditional practices include performance of the play, "Don Juan Tenorio" and offerings made to the dead. All Saints' Say occurs on the same day as the Mexican "Dide los Innocentes" a day dedicated to deceased children.

Across much of Europe, the day is commemorated with offerings of flowers left on the graves of the dead. In Eastern Europe, candles are lit on graves instead of offerings of flowers.

In some places, such as the Philippines, graves can be painted and repaired by family members. Many of these practices blur the distinction between All Saints' Day and All Souls' Day.

These celebrations often blur the distinction between All Saints' Day, which is properly dedicated to those who are in heaven, and All Souls' Day, on which prayers are offered for all those who have died, but have not yet reached heaven.

In Mexico, the Day of the Dead holy days extend from October 31 through November 2.

It is important to remember these basic facts:

Halloween is a secular holiday that comes the night before All Saints' Day.

All Saints' Day is on November 1, and it is a Holy Day of Obligation.

All Souls' Day in on November 2, and it is NOT a Holy Day of Obligation.

The Day of the Dead is a Mexican holiday that has spread in popularity into parts of the United States and across Latin America. It is celebrated from October 31 through November 2, to coincide with both the American tradition and the Catholic holy days. Those three days are dedicated to all of the dead.to all of the dead.