Enter the year in question:
* The Ecclesiastical year begins on January 1.
Full list of moveable and fixed holidays
The "octave" of any holiday = eight days after the holiday- counting the holiday itself. Thus the octave of a Sunday is the following Sunday. Lent 40 week days between Ash Wednesday and Easter Advent Period from Advent Sunday to December 25 Sexagesima Sunday Sunday after Septuagesima Sunday. Quinquagesima Sunday 2nd Sunday after Septuagesima Sunday Shrove Tuesday day before Ash Wednesday. Passion Sunday 2nd Sunday before Easter Palm Sunday Sunday before Easter Quasimodo (Low) Sunday Sunday after Easter Good Friday Friday before Easter Maundy Thursday Thursday before Easter Adorate dominum 3rd Sunday after January 6 Adrian (Canterbury) January 9 Ad te levavi Advent Sunday Agatha February 5 Agnes January 21 Alban June 22 (or June in 1662 Prayer Book) Aldhelm May 25 All Hallows November 1 All Saints November 1 All Souls November 2 Alphege April 19 Ambrose April 4 Andrew November 30 Anne July 26 Annunciation March 25 Aspiciens a longe Advent Sunday Audoenus (Ouen) August 24 or 25 Audrey (Ethelreda) October 17 Augustine (Canterbury) May 26 Augustine (Hippo) August 28 Barnabas June 11 Bartholomew August 24 Bede, Venerable May 27 Benedict March 21 Translation of Benedict July 11 Birinus December 3 Blasius February 3 Boniface June 5 Botolph June 17 Bricius November 13 Candlemas February 2 Canite Tuba 4th Sunday in Advent Cantate domino 4th Sunday after Easter Cathedra Petri February 22 Catherine November 25 Cecilia November 22 Cena domini Thursday before Easter Chad (Cedde) March 2 Christmas (Natale Domini) December 25 Christopher July 25 Circumcision January 1 Clausum Pasche 1st Sunday after Easter Clement November 23 Cornelius+Cyprian September 14 Corpus Christi Thursday after Trinity* Crispin and Crispinian October 25 Exaltation of the Cross September 14 Invention of the Cross May 3 Cuthbert March 20 translation of Cuthbert September 4 Cyprian and Justina September 26 Daemon mutus 3rd Sunday in Lent (after Ash Wednesday) Da pacem 18th Sunday after Trinity* David March 1 Deus in adiutorium 12th Sunday after Trinity* Deus in loco sancto 11th Sunday after Trinity* Deus qui errantibus 3rd Sunday after Easter Dicit dominus 23rd and 24th Sunday after Trinity* Dies cinerum Ash Wednesday Dies crucis adorande Good Friday Dies Mandati Maundy Thursday Dionysius, Rusticus, and Eleutherius October 9 Domine, in tua misericordia 1st Sunday after Trinity* Domine, ne longe Palm Sunday Dominus fortitudo 6th Sunday after Trinity* Dominus illuminatio mea 4th Sunday after Trinity* Dum, clamarem 10th Sunday after Trinity* Epiphany January 6 Dum medium silentium Sunday in octave of Christmas or Sunday after January 1 when this falls on eve of Epiphany (Jan. 6) Dunstan May 19 Eadburga (Winchester) June 15 Ecce deus adiuvat 9th Sunday after Trinity* Editha September 16 Edmund (archbishop) November 16 his translation June 9 Edmund (king) November 20 his translation April 29 Edward the Confessor January 5 his translation October 13 often called the feast of St. Edward in the quidene of Michaelmas Edward (king of Saxons) March 18 his translation I February 18 his translation II June 20 Egidius (Giles) September 1 Enurchus (Evurcius) September 7 Esto mihi Sunday before Ash Wednesday (Quinquagesima) Ethelbert (king) May 20 Ethelreda October 17 Euphemia September 16 Eustachius November 2 Exaudi domine Sunday in octave of Ascension or 5th Sunday after octave of Pentecost (Trinity)* Exsurge domine 2nd Sunday before Ash Wednesday (Sexagesima) Fabian and Sebastian January 20 Factus est dominus 2nd Sunday after Trinity* Faith October 6 Felicitas November 23 Fransiscus October 4 Gaudete in domino 3rd Sunday in Advent George April 23 Gregory March 12 Grimbold July 8 Gule of August August 1 Guthlac April 11 Hieronymous (Jerome) September 30 Hilary January 13 Hugh (bishop of Lincoln) November 17 Inclina auram tuam 15th Sunday after Trinity* In excelso throno 1st Sunday after Epiphany Innocents December 28 Invocavit me 1st Sunday in Lent In voluntate tua 21st Sunday afterTrinity* Isti sunt dies Passion Sunday James July 25 Jerome (Hieronymus) September 30 John the Baptist June 24 his beheading August 29 John the Evangelist December 27 Ante Portram Latinam May 6 Jubilate omnis terra 3rd Sunday after Easter Judica me Passion Sunday Judoc December 13 Justus es domine 17th Sunday after the octave of Pentecost (Trinity)* Lady day (annunciation) March 25 Laetare Jerusalem 4th Sunday in Lent Lambert September 17 Lammas August 1 Laudus September 21 Laurence August 10 Leonard November 6 Lucianus and Geminianus September 16 Lucian January 8 Lucy December 13 Luke October 18 Machutus November 15 Margaret (queen of Scotland) July 8 Margaret (virgin and martyr) July 20 Mark April 25 Martin November 11 His translation July 4 Mary, Blessed Virgin Annunciation (Lady day) March 25 Assumption August 15 Conception December 8 Nativity September 8 Purification February 2 Visitation July 2 Mary Magdalene July 22 Mathias February 24 (25 on leap years) Matthew September 21 Maurice September 22 Meliorus October 1 Memento mei 4th Sunday in Advent Michael September 29 In Monte tumba October 16 Mildred July 13 Miserere mihi 16th Sunday after Trinity* Misericordia domini 2nd Sunday after Easter Name of Jesus August 7 Nicholas December 6 Nicomedes June 1 Oculi 3rd Sunday in Lent Omnes gentes 7th Sunday after Trinity* Omnia quae fecisti 20th Sunday after Trinity* Omnis terra 2nd Sunday after Epiphany Osanna Palm Sunday O Sapientia December 16 Osmund December 4 Oswald (bishop) February 28 Oswald (king) August 5 Patrick March 17 Paul, Conversion of January 25 Perpetua March 7 Peter and Paul June 29 Peter and Vincula August 1 Philip and James May 1 Populus Sion 2nd Sunday in Advent Prisca January 18 Priscus September 1 Protector noster 14th Sunday after Trinity* Quasimodo 1st Sunday after Easter Reddite quae sunt 23rd Sunday after* Remigius, Germanus, and Vedastus October 1 Reminiscere 2nd Sunday in Lent Respice domine 13th Sunday after Pentecost Respice in me 3rd Sunday after Trinity* Richard April 3 his translation July 15 Rorate celi 4th Sunday in Advent Salus populi 19th Sunday after Pentecost Scholastica February 10 Si iniquitates 22nd Sunday after Trinity* Silvester December 31 Simon and Jude October 28 Sitientes Saturday before Passion Sunday Stephen December 26 his invention August 3 Suscepius deus 8th Sunday after Trinity* Swithun July 2 his translation July 3 Thomas the Apostle December 21 his translation July 3 Thomas Becket December 29 his translation July 7 Timotheus and Symphorianus August 22 Transfiguration August 6 Urban May 25 Valentine February 14 Vincent January 22 Viri Galilei Ascension Day Vocem jucunditatis 5th Sunday after Easter Wilfrid October 12 Wulfstan January 19
* After 1570, subtract one week.