Advent, Allhallowmas, Allhallows, Allhallowtide, Annunciation, Annunciation Day, Ascension Day, Ash Wednesday, Candlemas, Candlemas Day, Carnival, Christmas, Corpus Christi, Easter, Easter Monday, Easter Saturday, Easter Sunday, Eastertide, Ember days, Epiphany, Good Friday, Halloween, Hallowmas, Holy Thursday, Holy Week, Lady Day, Lammas, Lammas Day, Lammastide, Lent, Lententide, Mardi Gras, Martinmas, Maundy Thursday, Michaelmas, Michaelmas Day, Michaelmastide, Palm Sunday, Pancake Day, Passion Week, Pentecost, Quadragesima, Quadragesima Sunday, Septuagesima, Trinity Sunday, Twelfth-day, Twelfth-tide, Whit-Tuesday, White Sunday, Whitmonday, Whitsun, Whitsunday, Whitsuntide, Whitweek

For further exploring for "shrove tuesday" in Webster Dictionary Online