ChurchYear.net has a nice entry about All Saints Day that gives a solid overview of the holy day: “All Saints Day is when the Church commemorates all saints, known and unknown. The eve of All Saints is known as All Hallows Eve, or Halloween. All Saints Day is November 1.” I also like the section answering the objection, “Isn’t Celebrating All Saints Day Idolatry?” Enjoy!

Oh, and although All Saints Day is a holy day of obligation, since it falls on a Saturday this year, the precept to attend Mass is abrogated (see the article “About Holy Days of Obligation“).