What Mardi Gras 2018 Meant on the Calendar
Mardi Gras 2018 fell on March 6, a date derived from the moveable feast of Easter. Mardi Gras—also known as Shrove Tuesday or Fat Tuesday—is the final day of Carnival season and always occurs 47 days before Easter Sunday. Because Easter shifts between March 22 and April 25 based on ecclesiastical rules, Mardi Gras can fall anywhere between February 3 and March 9. In 2018, the Easter computus placed Easter on April 1, making Shrove Tuesday March 6.
How the Mardi Gras Date Is Determined
Relationship to Easter
Mardi Gras is a “moveable feast” in both liturgical and calendrical terms. It is set by counting backward 47 days (40 days of Lent plus 6 Sundays) from Easter Sunday. Factors that affect Easter’s date—including the first full moon after the vernal equinox and the insistence that Easter always follow the Jewish Passover—propagate directly into the Mardi Gras calendar. This relationship is the single most important rule for determining the date in any given year.
Carnival Season and Key Milestones
Mardi Gras is the culmination of a season that begins on the Feast of the Epiphany (January 6). Important markers include:
- Epiphany (January 6)—season begins
- Septuagesima—70 days before Easter
- Ash Wednesday—first day of Lent
- Passion Sunday—two weeks before Easter
- Palm Sunday—Sunday before Easter
- Maundy Thursday—day before Good Friday
- Good Friday—day before Easter
- Holy Saturday—day before Easter Sunday
- Easter Sunday—anchor date
- Mardi Gras (Shrove Tuesday)—day before Ash Wednesday
For 2018, this sequence placed Ash Wednesday on February 14 and Mardi Gras on March 6, giving the season a 49-day run from Epiphany to Mardi Gras inclusive.
2018 Mardi Gras Calendar at a Glance
| Date | Event | Why It Matters |
|---|---|---|
| January 6, 2018 | Epiphany | Season start; reveals Christ to the Gentiles |
| February 14, 2018 | Ash Wednesday | First day of Lent; 40-day fasting period begins |
| March 6, 2018 | Mardi Gras (Shrove Tuesday) | Final day of feasting before Lent; 47 days before Easter |
| March 11, 2018 | Palm Sunday | Jesus’ entry into Jerusalem; one week before Easter |
| March 29, 2018 | Good Friday | Commemoration of the Crucifixion |
| March 31, 2018 | Easter Sunday | Resurrection; anchor for Carnival calculations |
Why Mardi Gras Moves Each Year
Because Easter is the anchor, and Easter is defined by a blend of solar and lunar cycles tied to the vernal equinox and Passover, Mardi Gras shifts earlier or later within a predictable window. Leap years, the ecclesiastical full moon, and the rule that Easter cannot precede the equinox all contribute to the variation. The result is a movable celebration that can appear any day between February 3 and March 9, requiring communities to consult calendars annually when planning events, travel, and parades.
Global Observance and Cultural Context
While New Orleans is the most famous US city for Mardi Gras festivities, the date is consistent wherever Christians observe Shrove Tuesday. Many countries call it Mardi Gras, Fat Tuesday, or Shrove Tuesday, but the calculation remains the same: the day before Ash Wednesday. Local traditions, food, and parade schedules vary, yet the liturgical anchor to Easter unites the worldwide calendar. In 2018, regions from Rio de Janeiro to Nice marked the day on March 6, aligning with the same Easter-based computation.
Practical Planning for Future Reference
How to Determine Mardi Gras in Any Year
- Find Easter Sunday for the target year (between March 22 and April 25).
- Count backward 47 days (this is the mathematical Shrove Tuesday).
- Confirm the result falls between February 3 and March 9.
- Adjust for local calendars if necessary, though the Western Christian calculation is standard for most large-scale public celebrations.
Quick Reference: Mardi Gras Window
Mardi Gras can occur as early as February 3 (if Easter is March 25) or as late as March 9 (if Easter is April 25). This gives a 34-day range spanning the end of winter into early spring.
Key Facts at a Glance
| Attribute | Verified Detail | Source Type |
|---|---|---|
| Mardi Gras 2018 date | March 6, 2018 | Easter-based computus |
| Relation to Easter 2018 | 47 days before Easter Sunday | Liturgical calendar |
| Easter 2018 date | April 1, 2018 | Ecclesiastical rules |
| Carnival season start | January 6 (Epiphany) | Christian tradition |
| Possible Mardi Gras range | February 3 – March 9 | Derived from Easter rules |
Common Misconceptions
Some assume Mardi Gras is always in February, but it can extend into early March. Others think it is always 47 days before Easter, which is correct, but forget that Sundays are counted in the 47, making the interval 47 days rather than 40 days of fasting alone. There is no change to the basic rule between 2018 and other years; only the calendar placement differs. Anyone planning multiyear events should verify the date annually using Easter’s computus rather than assuming a fixed month.
Related Observances Around the World
Many cultures mark the same liturgical moment with distinct names and customs. Pancake Day in the United Kingdom, Mardi Gras in French-speaking regions, and Carnaval in Latin America all converge on the day before Ash Wednesday. Though local foods, parades, and public festivals differ, the shared anchor to Easter ensures these observances remain synchronized in the Christian calendar year after year.
Summary
Mardi Gras 2018 was on March 6, a direct consequence of Easter falling on April 1. The date is set by a computus that ties it 47 days before Easter Sunday, producing a movable celebration that can occur any day between February 3 and March 9. Understanding the role of Easter, Lent, and the liturgical calendar makes it easy to determine Mardi Gras in any year without relying on news-specific updates.