Latin Names for Sundays in the Roman Rite

Unfortunately in the past fifty years Catholics have all but forgotten that each Sunday of the Liturgical Year has a special name, taken from the first words of the Introit from the Proper Prayers for the Mass that day.

For your edification, I present the Latin names for these Sundays.  Some of these names (e.g. Laetare Sunday) are more common than others.  You may find the proper prayers on my separate page dedicated to the Traditional Mass Propers by clicking here.

Note: The Class distinction listed below is from the 1962 Rubrics.

Advent
First Sunday of Advent
1 Cl.	Purple	Missa 'Ad Te Levave'
Second Sunday of Advent
1 Cl.	Purple	Missa 'Populus Sion'
Third Sunday of Advent (Gaudete Sunday)
1 Cl.	Rose	Missa 'Gaudete'
Wednesday/Friday/Saturday of Advent Embertide (Wednesday, Friday and Saturday after the Third Sunday -- Gaudete Sunday -- of Advent)
2 Cl.	Purple	Missa 'Rorate Coeli'/Missa 'Prope es Tu'/Missa 'Veni'
Fourth Sunday of Advent
1 Cl.	Purple	Missa 'Rorate Coeli'
Christmastide
Vigil of Christmas
1 Cl.	Purple	Missa 'Hodie Scietis'
Nativity of Our Lord Jesus Christ (Christmas)
1 Cl. with Octave	White	First Mass at Midnight: Missa 'Dominus Dixit' Second Mass at Dawn: Missa 'Lux Fulgebit' Third Mass During the Daytime: Missa 'Puer Natus Est'
Sunday within the Octave of the Nativity of Our Lord
1 Cl.	White	Missa 'Dum Medium'
Feast of the Holy Name of Jesus (the Sunday after Jan. 1, or Sunday after the Octave Day of the Nativity, or Jan. 2, or the Sunday between the Octave Day of the Nativity and the Epiphany)
2 Cl.	White	Missa 'In Nomine Jesu'
The Epiphany of Our Lord Jesus Christ
1 Cl.	White	Missa 'Ecce Advenit'
First Sunday after Epiphany (Feast of the Holy Family)
2 Cl.	White	Missa 'Exsultat Gaudio'
Time after Epiphany
Second Sunday after Epiphany
2 Cl..	Green	Missa 'Omnis Terra'
Third Sunday after Epiphany
2 Cl.	Green	Missa 'Adorate Deum'
Fourth Sunday after Epiphany
2 Cl.	Green	Missa 'Adorate Deum'
Fifth Sunday after Epiphany
2 Cl.	Green	Missa 'Adorate Deum'
Sixth Sunday after Epiphany
2 Cl.	Green	Missa 'Adorate Deum'
Septuagesima
First Sunday of Septuagesima (Septuagesima Sunday)
2 Cl.	Purple	Missa 'Circumdederunt Me'
Second Sunday of Septuagesima (Sexagesima Sunday)
2 Cl.	Purple	Missa 'Exsurge'
Third Sunday of Septuagesima (Quinquagesima Sunday)
2 Cl.	Purple	Missa 'Esto Mihi'
Lent
Ash Wednesday
1 Cl.	Purple	Missa 'Misereris Omnium'
First Sunday of Lent (Quadragesima Sunday)
1 Cl.	Purple	Missa 'Invocabit Me'
Wednesday/Friday/Saturday of Lenten Embertide (Wednesday, Friday, and Saturday after the First Sunday of Lent)
2 Cl.	Purple	Missa 'Reminiscere Miserationum Tuarum'/Missa 'De Necessitatibus'/Missa 'Intret Oratio'
Second Sunday of Lent
1 Cl.	Purple	Missa 'Reminiscere Miserationum'
Third Sunday of Lent
1 Cl.	Purple	Missa 'Oculi Mei'
Fourth Sunday of Lent ("Laetare Sunday" or "Rose Sunday")
1 Cl.	Rose	Missa 'Laetare'
Fifth Sunday of Lent (Passion Sunday, which begins the two weeks of Passiontide)
1 Cl.	Purple	Missa 'Judica Me Deus'
Friday after Passion Sunday (Feast of the Seven Sorrows)
Com.	White	Missa 'Sabant Juxta'
Sixth Sunday of Lent and Second Sunday of Passiontide (Palm Sunday, which begins Holy Week)
1 Cl.	Red	Missa 'Domine Ne Longe'
Spy Wednesday (the Wednesday of Holy Week)
	Purple	Missa 'In Nomine Jesu'
Maundy Thursday (the Thursday of Holy Week. The three days called the "Sacred Triduum" begin now)
1 Cl.	White	Missa 'Nos Autem'
Good Friday (the Friday of Holy Week)
1 Cl.	Black	Mass of the Presanctified (not a true Mass, but a Communion Service using pre-sanctified Hosts)
Paschaltide
Holy Saturday (Eastertide begins with the Vigil Mass)
1 Cl.	Purple	No Mass, but an Easter Vigil Service which begins the Easter Season
Easter Sunday
1 Cl. with Octave	White	Missa 'Resurrexi'
Monday in Easter Week
1 Cl.	White	Missa 'Introduxit'
Tuesday in Easter Week
1 Cl.	White	Missa 'Aqua Sapientiae'
Wednesday in Easter Week
1 Cl.	White	Missa 'Venite'
Thursday in Easter Week
1 Cl.	White	Missa 'Victricem Manum Tuum'
Friday in Easter Week
1 Cl.	White	Missa 'Eduxit Eos Dominus'
Saturday in Easter Week
1 Cl.	White	Missa 'Eduxit Dominus'
First Sunday after Easter ("Low Sunday" or "Quasimodo Sunday" or "Divine Mercy Sunday")
1 Cl.	White	Missa 'Quasi Modo'
Second Sunday after Easter
	White	Missa 'Misericordia Domini'
Third Sunday after Easter
	White	Missa 'Jubilate Deo'
Fourth Sunday after Easter
	White	Missa 'Cantate Domino'
Fifth Sunday after Easter
	White	Missa 'Vocem Jucunditatis' Outside of Eastertide: Missa "Protexisti'
Ascension Thursday
1 Cl.	White	Missa 'Viri Galilaei'
Vigil of the Pentecost
1 Cl.	Red	Missa 'Cum Sanctificatus'
Pentecost Sunday (Whitsunday)
1 Cl. with Octave	Red	Missa 'Spiritus Domini'
Wednesday/Friday/Saturday of Whit Embertide (Wednesday, Friday and Saturday after Pentecost)
1 Cl./1 Cl./1 Cl.	Red/Red/Red	Missa 'Deus Dum Egredereris'/Missa 'Repleatur Os Meum'/Missa 'Caritas Dei'
Time after Pentecost
First Sunday after Pentecost (Trinity Sunday)
1 Cl.	Green	Missa 'Benedicta Sit'
Thursday after Trinity Sunday (Feast of Corpus Christi)
1 Cl.	White	Missa 'Cibavit Eos' and Procession
Second Sunday after Pentecost
2 Cl.	White	Missa 'Factus Est Dominus'
Friday after the Second Sunday after Pentecost (Feast of the Sacred Heart)
1 Cl.	White	Missa 'Cogitationes Cordis'
Third Sunday after Pentecost
2 Cl.	White	Missa 'Respice In Me'
Fourth Sunday after Pentecost
2 Cl.	Green	Missa 'Dominus Illuminatio Mea'
Fifth Sunday after Pentecost
2 Cl.	Green	Missa 'Exaudi Domine'
Sixth Sunday after Pentecost
2 Cl.	Green	Missa 'Dominus Fortitudo'
Seventh Sunday after Pentecost
2 Cl.	Green	Missa 'Omnes Gentes'
Eighth Sunday after Pentecost
2 Cl.	Green	Missa 'Suscepimus Deus'
Ninth Sunday after Pentecost
2 Cl.	Green	Missa 'Ecce Deus Adjuvat'
Tenth Sunday after Pentecost
2 Cl.	Green	Missa 'Cum Clamarem'
Eleventh Sunday after Pentecost
2 Cl.	Green	Missa 'Deus In Loco'
Twelfth Sunday after Pentecost
2 Cl.	Green	Missa 'Deus in Adjutorum'
Thirteenth Sunday after Pentecost
2 Cl.	Green	Missa 'Respice Domine'
Fourteenth Sunday after Pentecost
2 Cl.	Green	Missa 'Protector Noster'
Fifteenth Sunday after Pentecost
2 Cl.	Green	Missa 'Inclina Domine'
Sixteenth Sunday after Pentecost
2 Cl.	Green	Missa 'Miserere Mihi Domine'
Seventeenth Sunday after Pentecost
2 Cl.	Green	Missa 'Justus Es Domine'
Wednesday/Friday/Saturday of Michaelmas Embertide (Wednesday, Friday and Saturday after September 14)
2 Cl.	Purple	Missa 'Exsultate Deo'/Missa 'Laetetur Cor'/Missa 'Venite Adoremus Deum'
Eighteenth Sunday after Pentecost
2 Cl.	Green	Missa 'Da Pacem Domine'
Nineteenth Sunday after Pentecost
2 Cl.	Green	Missa 'Salus Populi'
Twentieth Sunday after Pentecost
2 Cl.	Green	Missa 'Omnia Quae Fecisti'
Twenty-first Sunday after Pentecost
2 Cl.	Green	Missa 'In Voluntate Tua'
Twenty-second Sunday after Pentecost
2 Cl.	Green	Missa 'Si Iniquitates Observaveris'
Twenty-third Sunday after Pentecost
2 Cl.	Green	Missa 'Dicit Dominus'
Twenty-fourth Sunday after Pentecost
2 Cl.	Green	Missa 'Dicit Dominus'
Twenty-fifth Sunday after Pentecost
2 Cl.	Green	Missa 'Dicit Dominus'
Twenty-sixth Sunday after Pentecost
2 Cl.	Green	Missa 'Dicit Dominus'
Twenty-seventh Sunday after Pentecost
2 Cl.	Green	Missa 'Dicit Dominus'
Last Sunday of Pentecost (no matter how many Sundays in Pentecost there are)
2 Cl.	Green	Missa 'Dicit Dominus'