November 1 is All Saints Day, a Christian holiday that honors all the known and unknown saints of the Roman Catholic Church. It is a Holy Day of Obligation celebrated by the liturgical Church on November 1, and Catholics are expected to attend Mass on this day. All Saints Day is also celebrated by many Protestant churches, such as the Lutheran, Anglican, and Methodist traditions. The Eastern Orthodox Church and associated Eastern Catholic and Eastern Lutheran churches celebrate it on the first Sunday after Pentecost. The day is dedicated to the saints of the Church, that is, all those who have passed on to the afterlife. All Saints Day is a solemn Holy Day celebrated each year on the first of November, and it is a day to honor all the Saints who have entered the Kingdom of Heaven.