Happy All Saints Day!

A blessed Catholic All Saints Day to everyone! All Saints is the feast when we celebrate all the Christian saints, some well-known to us, and some known only to God. All Saints is a holy day of obligation, meaning all Catholics are required to attend Mass, unless a good reason prevents them from doing so. Charles over at Land of Hope and Glory has written two excellent posts explaining the concept of a Holy Day of Obligation:

Also, our Online Church Year and Liturgical Dictionary gives the basic definition and a list of all of these days.