Count the days on a calendar from Ash Wednesday to Easter Sunday and the number that comes out is 46, not 40. That’s not a mistake in how most people describe the season, and it’s not a modern miscount either. The gap between the number everyone says and the number the calendar actually shows has a specific, deliberate explanation, and it’s tied to a count that predates Christianity itself and a split between Eastern and Western churches that still produces two different Lents every single year.

The Number Nobody Invented For Lent

Forty shows up across the Bible as a recurring unit of testing, waiting, and transformation, long before it attached itself to the weeks before Easter. Lent borrowed the number rather than creating it.

That last one, Jesus’ fast before beginning his ministry, is the specific event Lent imitates. The Latin name for the season, Quadragesima, means simply “fortieth,” a direct label rather than a metaphor.

How 40 Days Became 46 on the Calendar

The extra six days are the Sundays. From the earliest centuries of the church, every Sunday was treated as a small-scale Easter, a weekly commemoration of the resurrection rather than an ordinary day of the fast. Since a day dedicated to celebrating the resurrection didn’t fit the penitential mood of Lent, Sundays were carved out of the fasting count entirely, even though they remain part of the season on the calendar.

This is also why Western Lent always begins on a Wednesday rather than a Monday. Counting backward from Easter Sunday, skipping every Sunday along the way, lands the 40th fasting day on a Wednesday, which became known as Ash Wednesday.

Why Lent Starts on a Wednesday At All

The 40-day length itself was already assumed by the time of the Council of Nicaea in 325, where records refer to it using the Greek term Tessarakoste, suggesting the custom predates the council rather than originating there. What Nicaea settled was the method for calculating Easter’s date, tying it to the first Sunday after the first full moon following the spring equinox, which in turn determines every date connected to Lent each year. The exact starting point of Lent wasn’t formally fixed until centuries later, when Pope Gregory I, who reigned from 590 to 604, moved the beginning of the season back to 46 days before Easter, creating Ash Wednesday as a specific, named day for the first time.

The Ashes Weren’t Always for Everyone

Ash Wednesday’s signature ritual, marking foreheads with ash in the shape of a cross, didn’t start as something every churchgoer did. In the early centuries, ashes were reserved for public penitents, people formally entering a period of penance for serious sin, as a visible sign of their status before the community. The practice spread gradually over the following centuries until Pope Urban II, at the Council of Benevento in 1091, formally extended it to all clergy and laity, turning what had been a punishment-adjacent ritual into a universal mark of the season for every Christian in attendance.

When Does Lent Actually End?

Even the finish line has moved. For most of church history, Lent ran all the way through Holy Saturday, ending only with the Easter Vigil. That changed with the liturgical reforms following the Second Vatican Council: the 1969 Roman Missal, issued under Pope Paul VI, now defines Lent as concluding at the evening Mass on Holy Thursday, at which point the separate three-day period known as the Paschal Triduum begins and runs through Easter Sunday. The 40-day fast and the days immediately surrounding Easter are, officially, two different liturgical seasons now, even though most people still describe the whole stretch as one continuous “Lent.”

The Eastern Calculation Is a Completely Different System

Orthodox Christianity keeps its own version of this season, called Great Lent, and it reaches the same number, 40, through the opposite method. Rather than excluding Sundays, Great Lent counts every single day, Sundays included, and simply runs for 40 uninterrupted days. It begins on Clean Monday rather than Ash Wednesday, since Eastern Christianity doesn’t observe the ash ritual at all, and concludes on Lazarus Saturday, the day before Palm Sunday, rather than folding straight into Holy Week.

Orthodox churches that still follow the older Julian calendar for their liturgical dates compound the difference further, since their Pascha often lands weeks after the Western Easter date, sometimes by as much as five weeks.

Both traditions insist on exactly forty days and get there by doing the opposite math, one subtracts its feast days out of a longer season, the other counts straight through and adds Holy Week on top. worldtimedata

A Word That Never Mentions the Number 40

Almost every Romance language names this season after the number itself: Spanish uses Cuaresma, French uses Carême, Italian uses Quaresima, all descendants of the Latin Quadragesima. English is the outlier. “Lent” comes from the Old English word lencten, simply meaning “spring,” a reference to the lengthening days of the season rather than to the 40-day fast happening inside it, a similar moveable-fast pattern to Ramadan’s shifting dates in Islamic practice. Every other major Western language calls the season by its length. English named it, instead, after the season itself.