All Saints Day Mass from Cathedral with Archbishop Cordileone

November 1, the Solemnity of All Saints, is a holy day of obligation, when Catholics are obliged to attend Mass. Mass times at the Cathedral are 7:00 a.m. and 12:10 p.m. There is also a Vigil Mass on the eve of the holy day, October 31, at 7:00 pm. Archbishop Salvatore Cordileone will be the principal celebrant at the 12:10 pm Mass on the Feast of All Saints.  
The Mass at 12:10 pm on November 1 will be livestreamed here.

Reading 1 Rv 7:2-4, 9-14

... I had a vision of a great multitude, which no one could count,
from every nation, race, people, and tongue. They stood before the throne and before the Lamb, wearing white robes and holding palm branches in their hands. They cried out in a loud voice: "Salvation comes from our God, who is seated on the throne,and from the Lamb....."

 

Reading 2 1 Jn 3:1-3

....Beloved, we are God's children now; what we shall be has not yet been revealed. We do know that when it is revealed we shall be like him,
for we shall see him as he is. Everyone who has this hope based on him makes himself pure, as he is pure....

Gospel Mt 5:1-12a

When Jesus saw the crowds, he went up the mountain,
and after he had sat down, his disciples came to him.
He began to teach them, saying:

"Blessed are the poor in spirit,
for theirs is the Kingdom of heaven....."

What is the Feast of All Saints?  Why do Catholics celebrate it? How is it related to the Feast of All Souls on the following day? When did it begin?  To learn more about this annual solemnity, observed every November 1, read the article All Saints and All Souls by Fr. William Saunders. 

"The Feast of All Saints is one of the greatest of all the feasts because it celebrates what could have been impossible. The cross is a tree that bears fruit. This is the feast of its harvest. The celebrations of the mysteries in the life of Our Lord are glorious and there is no detracting from them. But He was God. This day we celebrate the perfecting of human nature, by grace pouring from the side of Christ on the cross, through His Church and His sacraments, remaking men after their despoiling in the Garden...."
                      -    Mary Reed Newland, on The Feast of All Saints (CERC).