
Sunday holds a significant place in the Catholic faith. It is considered a holy day of obligation, marking the celebration of the Holy Eucharist, which commemorates the death and resurrection of Christ. This tradition, rooted in the Jewish memorial of Passover, is central to the Catholic identity and mission. Each Sunday, Catholics gather for Mass, prayer, and communion, connecting with their community and God. The liturgical year in the Catholic Church begins on the First Sunday of Advent, and Sundays are integral to the liturgical calendar, with only specific feasts of the Lord or saints taking precedence over the weekly celebrations.
| Characteristics | Values |
|---|---|
| Frequency | Every Sunday |
| Purpose | To celebrate the Holy Eucharist: Sacrifice, Memorial, and Meal |
| Reason | To proclaim the death and resurrection of Christ (Paschal Mystery) |
| Obligation | Catholics are obliged to participate at Mass and abstain from unnecessary work |
| Date | The liturgical year begins on the First Sunday of Advent during the preceding calendar year |
| Exceptions | Only a limited number of feasts of the Lord or the saints may take the place of the scheduled Sunday celebration |
| Solemnities | The Solemnity of the principal patron of the place, city, or state; The Solemnity of the dedication and the anniversary of the dedication of one's own church |
| Feast Days | Begin their celebration on the evening before |
| Memorials | Are celebrated over the course of one day and can be Obligatory or Optional |
| Number of Sundays | Varies according to the date of Easter, ranging from 18 to 23 |
| Ordinary Time | Begins on a Monday and includes the days between Christmastide and Lent, and between Eastertide and Advent |
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What You'll Learn
- Sunday is a unique liturgical category and a holy day of obligation
- The celebration of the Holy Eucharist is central to Sunday observance
- The liturgical year begins on the First Sunday of Advent
- Ordinary Time falls outside Christmastide and Eastertide seasons
- Sundays are tied to a range of dates, except during Lent and Easter

Sunday is a unique liturgical category and a holy day of obligation
The Second Vatican Council brought renewed emphasis to Sunday as a unique liturgical category. It is considered "the Lord's day" and the "original feast day", which must be observed as the "primordial holy day of obligation". This means that Sundays are considered the foremost holy days of obligation in the Catholic Church, and only a limited number of feasts of the Lord or the saints may take precedence over the scheduled Sunday celebration.
Each liturgical year in the Catholic Church begins on the First Sunday of Advent during the preceding calendar year. For example, the First Sunday of Advent in 2019 marked the beginning of the 2020 liturgical year. The liturgical year is governed by the Church and integrated into a liturgical calendar. This calendar includes both the entire cycle of celebrations of the mystery of salvation and the celebration of saints who hold universal significance.
Sundays are considered holy days of obligation, where the faithful are expected to attend Mass and abstain from unnecessary work or activities. In addition to Sundays, there are a few other holy days of obligation throughout the year, which may vary depending on the region. For example, in the United States, there are six Solemnities observed as feasts of precept, in addition to every Sunday. These holy days of obligation are days of celebration and worship, honouring the central mysteries of the Catholic faith.
The specific holy days of obligation can vary from year to year, depending on the day of the week they fall on. For example, if the Solemnity of Mary, the Assumption of the Blessed Virgin Mary, or the Solemnity of All Saints falls on a Saturday or Monday, the obligation is often lifted, and the feast is celebrated on the Sunday instead. In such cases, while Mass attendance is not obligatory, individuals are still encouraged to participate.
Holy days of obligation are not limited to Sundays and can include other significant days in the liturgical year. These days are determined by the local conference of bishops, who may suppress certain feasts or transfer them to Sundays. For instance, in the United States, the feast of Saint Joseph and the feast of Saints Peter and Paul are not observed as holy days of obligation.
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The celebration of the Holy Eucharist is central to Sunday observance
For Catholics, the celebration of the Holy Eucharist is at the heart of Sunday observance. It is a sacred action that surpasses all others in the faith. The Eucharist Liturgy is an action of Jesus Christ and his church praising God and giving thanks. The central person in the Eucharist is the Trinitarian God, to whom we give praise and thanksgiving.
The Eucharist is a celebration of the death and resurrection of Christ (Paschal Mystery). It was instituted in the context of a Jewish meal, and as such, the central element has been the Jewish prayer at meals, following the traditional form and structure of all Jewish prayers (Berakah). The prayer evolved into what we now know as The Eucharistic Prayer of the Mass, which is said during Mass each Sunday. The basic form and structure have been preserved, but the content has changed to include the mighty works of God, through his Son Jesus Christ, by the power of the Holy Spirit.
The bread and wine are consecrated separately to indicate the separation of the body from the blood that occurs at death, especially a death that is a sacrifice. The bread and wine are offered to God the Father by the faithful baptised and are transformed into the Body and Blood of Christ by the Holy Spirit. This change in substance is called "transubstantiation", and it is why Catholics believe in the Real Presence of Christ in the Eucharist.
The celebration of the Eucharist is a reliving of the Crucifixion and death of Jesus. It is a sacred meal that affirms and proclaims the unity of believers in Christ and their common mission as his disciples. The Eucharist is central to the Catholic faith, identity, and mission.
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The liturgical year begins on the First Sunday of Advent
The liturgical year in the Catholic Church is structured around the mystery of Christ, from incarnation to ascension, and the expectation of his second coming. The liturgical year begins on the First Sunday of Advent, which falls on the Sunday nearest November 30, and ends on Christmas Eve. The Advent season is a time of devout and joyful expectation of the coming of Christ. It is often marked by the Advent wreath, a garland of evergreens with four candles, each representing 'hope', 'faith', 'joy', and 'love'. The liturgical colour for this season is violet or purple, and blue in Anglican/Episcopalian, Methodist, and Lutheran traditions.
The liturgical year consists of a seasonal cycle and a sanctoral cycle, called the Proper of Time and the Proper of Saints, respectively. The Proper of Time includes the entire cycle of celebrations of the mystery of salvation, while the Proper of Saints includes the birthdays of the saints. The liturgical year is governed by the Church and is integrated into a liturgical calendar. The Second Vatican Council emphasised the importance of Sunday as a unique liturgical category, stating that it "must be observed in the universal Church as the primordial holy day of obligation". Thus, Sundays and solemnities take precedence over other celebrations.
The liturgical year includes various seasons, such as Christmastide, Eastertide, and their preparatory seasons of Advent and Lent. Ordinary Time falls outside these great seasons and includes the days between Christmastide and Lent, and between Eastertide and Advent. It is a period of living out the Christian faith and reflecting on the meaning of Christ's resurrection in ordinary life. The liturgical colour for Ordinary Time is green. The last Sunday of Ordinary Time is the Solemnity of Christ the King.
The liturgical year also includes special observances and holy days of obligation, such as the feasts of the Lord and the saints. These days are an opportunity for the faithful to participate in Mass and abstain from unnecessary work, focusing on spiritual renewal. The specific celebrations and observances vary across different traditions within the Catholic Church, such as the Roman Rite, Anglican, Methodist, and Lutheran traditions, each with its own unique liturgical calendar and practices.
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Ordinary Time falls outside Christmastide and Eastertide seasons
In the liturgical calendar of the Catholic Church, Ordinary Time (Latin: Tempus per annum) is the period that falls outside the two major seasons of Christmastide and Eastertide, as well as their preparatory seasons of Advent and Lent. Ordinary Time, therefore, includes the days between Christmastide and Lent, and Eastertide and Advent. The liturgical colour assigned to Ordinary Time is green.
Ordinary Time is not a season of feasting or penance, but a period that focuses on the mystery of Christ being worked out in the everyday lives of the faithful. It is a time to reflect on the ongoing and rhythmical nature of the Christian life, which includes both special occasions and holy days, as well as the ordinary moments that make up the majority of our lives. Ordinary Time is meant to be lived, with an emphasis on active participation rather than passive reception.
Ordinary Time is divided into two parts but is considered one season. The first part of Ordinary Time begins the Monday after the Feast of the Epiphany and continues until Shrove Tuesday, the day before Ash Wednesday, which marks the beginning of Lent. The second part of Ordinary Time begins on the Monday after Pentecost and continues until the First Sunday of Advent. This second part is typically about twice as long as the first. Overall, Ordinary Time spans about 33 or 34 weeks, depending on the calendar year and the dates of Catholic feast days.
The weeks of Ordinary Time are identified or counted using ordinal numerals, from the 1st week of Ordinary Time in January to the 34th week towards the end of November. The last Sunday of Ordinary Time is the Solemnity of Christ the King, with the preceding Sunday being the Thirty-Third Sunday in Ordinary Time, and the ordinal numbers counting backward from that point. The two Sundays following Pentecost, which fall within Ordinary Time, are the Solemnity of the Most Holy Trinity and the Solemnity of the Most Holy Body and Blood of Christ. These Sundays are part of Ordinary Time but are not numbered.
In the liturgical calendar, each Sunday is a holy day of obligation, and certain solemnities are also observed as feasts of precept. The celebration of an Ordinary Time weekday gives way to any solemnities, feasts, or obligatory memorials that may fall on the same day. Sundays and solemnities begin their celebration on the evening before, while feasts and memorials are observed over the course of one day. Memorials can be either obligatory or optional.
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Sundays are tied to a range of dates, except during Lent and Easter
Sundays are an important part of the liturgical calendar for Catholics. The Second Vatican Council emphasised Sunday as a unique liturgical category, with the Lord's Day deemed "the primordial holy day of obligation". Each Sunday is a holy day of obligation, and the celebration of the day begins on the preceding evening.
The liturgical calendar is organised by the Church and is tied to the mystery of Christ. Each liturgical year begins on the First Sunday of Advent, with the preceding Sunday being the last day of the previous liturgical year. The liturgical calendar includes the entire cycle of celebrations of the mystery of salvation, as well as the feasts of saints with universal significance.
The liturgical year is divided into two main parts: Ordinary Time and the great seasons of Christmastide and Eastertide, along with their preparatory seasons of Advent and Lent. Ordinary Time falls outside these two great seasons and their preparatory seasons. It includes the days between Christmastide and Lent, and between Eastertide and Advent. The liturgical colour assigned to Ordinary Time is green.
The number of weeks in Ordinary Time varies depending on the date of the First Sunday of Advent. If it falls in November, there will be 33 weeks of Ordinary Time. If it falls on December 2 or 3, there will be 34 weeks. If it falls on December 1, there will be 34 weeks only during a leap year. In a year with 33 weeks of Ordinary Time, the omitted week is the one between the weeks immediately surrounding Lent and Easter.
Therefore, Sundays are tied to a range of dates throughout the liturgical calendar, except during Lent and Easter, when the weeks surrounding these holy seasons are not counted as part of Ordinary Time.
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Frequently asked questions
Sunday is a holy day of obligation for Catholics, who attend church to pray, listen to the priest's sermon, and go to communion. The celebration of the Holy Eucharist is central to Sunday observance, commemorating the death and resurrection of Christ.
The Holy Eucharist is a prayer that follows the traditional form of Jewish prayers, evolving from the Jewish prayer at meals. It includes the words spoken by Jesus during the Last Supper: "This is my Body… This is my Blood…”.
The liturgical calendar organises the Catholic year, beginning with the First Sunday of Advent. Sundays are considered holy days of obligation, with only a limited number of feasts allowed to replace the usual Sunday celebration.
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