What Are the Quarter Days and What Do They Mean?

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Ancient Celtic Calendar: Quarter Days and Cross-Quarter Days

Andrew E. Rothovius

Did you know that Halloween is an astronomical holiday? It's a descendant of the ancient Celtic calendar which was based on the seasons—with the Quarter Days near the solstices and equinoxes and the Cross-Quarter Days as the seasonal midpoints. Learn more—and find out why we all celebrate Groundhog Day, Christmas, and other holidays the way that we do today!

The Celtic Calendar 

The timing of present-day rituals, traditions, and holidays was influenced by the ancient Celts:

  • Their calendar year was divided into four seasons or major sections—four Quarter Days
  • Then, each section was divided in half, creating four Cross-Quarter days. For the ancient Celts, Cross-Quarter days signaled the beginning of a season! For example, what is now Groundhog Day (Candlemas) would be considered the start of spring.
  • Some historians are divided as to whether the ancient Celts observed the solstices and equinoxes (what we call Quarter Days). Some believe that the Celts divided the year into just four major sections: Samhain, Imbolc, Beltane, and Lughnasadh (what we call Cross-Quarter days). For this article, we will assume that the ancient Celts observed all eight divisions of the year.
  • Together, the Quarter Days and Cross-Quarter Days made an eight-part year that reflected the natural progression of the seasons.

The Four Quarter Days

The days that marked the four major divisions of the year were called Quarter Days; they marked the solstice (when the sun sets at its most northern or southern point on the horizon) and equinoxes (when the sun sets due west). This fit eadily into the rhythm of the ways people farmed.

As the 12-month Roman calendar was adopted for both civil and religious purposes, all of the Celtic days began to conform more closely with the liturgical year of the Christian church and became identified with major religious festivals.

March 25, Lady Day

Around the time of the spring equinox, Lady Day became the traditional day for hiring farm laborers for the planting and harvesting seasons ahead. (In the church calendar, this day became the feast of the Angel Gabriel's annunciation to the Virgin Mary that she would be the mother of Christ.)

June 24, Midsummer Day

Around the time of the summer solstice, this day was the midpoint of the growing season, halfway between planting and harvest. (The English church later celebrated this day as the birthday of John the Baptist, who foretold the coming of Jesus. The feast day of the Nativity of St. John the Baptist is celebrated exactly six months before that of the celebration of Christ's birth.) Folks celebrated by feasting, dancing, singing, and preparing for the hot summer days ahead. Learn more about Midsummer Day.

Image: A Midsommar celebration in Stockholm, Sweden. ArtesiaWells/Getty Images

September 29, Michaelmas

Around the time of the fall equinox, the harvest commenced on this day, and there were great fairs and festivals. This started the custom of early autumnal elections, because it was a convenient time for people to gather. Elections came to be shifted to November in the American climate, where the harvest season was more stretched out.

December 25, Christmas

This observance originated as a winter solstice festival and celebrated a time of resting and gathering fertility for a new round of sowing and reaping. The Celtic rituals merged easily with the Christian celebration of the birth of Jesus. Farm workers were usually paid for their year's labor at Christmas, giving them reason to celebrate and three months rest before the next season.

The Four Cross-Quarter Days

These days marked the midpoint between each solstice and equinox. For the ancient Celts, these signaled the beginning (not middle) of a season, with the major two divisions being winter (Samhain), starting the dark half of the year, and summer (Beltane), starting the light half of the year

February 2, Candlemas

Candlemas acquired its English name from the candles lit that day in churches to celebrate the presentation of the Christ Child in the temple of Jerusalem.

Originally, this day was called Imbolc (lambs' milk) because the lambing season began. It was also called Brigantia for the Celtic female deity of light, calling attention to the Sun being halfway on its advance from the winter solstice to the spring equinox.

Much of this day is grounded in the seasons—estimating how soon spring-like weather will come and when to plant the crops. 

  • It was not held as a good omen if the day itself was bright and sunny, for that betokened snow and frost to continue to the hiring of the laborers 6 weeks later on Lady Day.
  • If it was cloudy and dark, warmth and rain would thaw out the fields and have them ready for planting.

Our Groundhog Day is a remote survivor of that belief. Though we recognize animal behavior isn't always the way to judge planting dates, the tradition continues, often with a wink and a smile.


May 1, May Day

May Day, or Beltane, was the halfway point between the spring equinox and the summer solstice, and marked the beginning of summer for the ancient Celts. It was a day for dance and song to hail the sown fields starting to sprout.

May Day or Beltane (May 1) was a time for the pairing of young couples, although not yet for their wedding, which would not come until the Quarter Day which was called Midsummer Day (June 24). Midsummer is basically the same as the Summer Solstice, so there were approximately 6 weeks between May 1 and Midsummer for the couple to get to know each other. 

Today, June is still one of the most popular months for weddings!

August 1, Lughnasadh ("Lammas Day")

Lammas (a corruption of the Old English words for "loaf mass") was the midpoint between the summer solstice and autumnal equinox.

Traditionally a festival associated with harvesting grain, it marked the beginning of the wheat harvest, and especially celebrated the first wheat or corn crop. Grains harvested at Lammas time also include barley, oats, and sunflower. Tenant farmers would have presented the first crop harvest to their landlord.

  • Lughnasadh was the wedding of the Sun god Lugh to the Earth goddess, causing the ripening of crops.
  • The church transformed it into the "feast of first fruits." Villages would take the first loaves of bread to the "loaf mass," which became corrupted in pronunciation to "lammas." The word “lammas” comes from the Old English hlaf, “loaf,” and maesse, “mass” or “feast.”
  • After the loaf was blessed, the farmers broke it into four pieces and placed each piece in the corners of their barn to protect the newly harvested grain. Lammas bread was often made in shapes including wheat, owls, and corn dolls.

Much lore is associated with this day, including this proverb: "After Lammas Day, corn ripens as much by night as by day."

It was upon a Lammas night, 
When corn rigs are bonie, 
Beneath the moon's unclouded light, 
I held awa to Annie; 
The time flew by, wi' tentless heed, 
Till, 'tween the late and early, 
Wi' sma' persuasion she agreed 
To see me thro' the barley

–Robert Burns

The date is still celebrated in England, Scotland, Wales, Northern Ireland and other countries in the Northern Hemisphere by baking Lammas bread, making corn dollies, bundling twigs together and enjoying large feasts with friends and family.

October 31, Samhain

Samhain ("summer's end") is celebrated as today's Halloween. Many historians believe that it served as the start of the new year in the Celtic calendar—their "New Year's Day."

It was the day when the cattle were brought in from pasture; those needed for the winter's supply of meat would be slaughtered. Since Samhain was the death-night of the old year, it came to be associated with ghosts and graveyards. During this dark time of year, it was believed that the spirits of the dead wandered from sunset until midnight. After midnight, the ghosts are said to go back to rest. (That day, November 1, later became All Saints’ Day.) Samheim has happier associations too, such as apple bobbing, which was a form of telling fortunes for the new year.

We hope you found this history interesting! It's fascinating to us how our modern holidays reflect the rich fabric of our past.



Mary Midkiff (not verified)

1 month ago

Cross quarter days actually fall about five days after we celebrate them because the Celts had a lunar calendar with thirteen months and they fell on the first day of their month and when the calendar changed to the twelve month calendar that we use now they continued to celebrate them on the first of the month if you Count the days between solstice and equinox the halfway point is later

Christine Stouffer (not verified)

2 months ago

I agree with William . I think the article should have said that John the Baptist foretold the “coming” of a Savior, not the actual “birth”.

The Editors

1 month 4 weeks ago

In reply to by Christine Stouffer (not verified)

Thank you, Christine (and William earlier) for bringing this to our attention. We have revised the article to make it clearer.

William E Baxter (not verified)

3 months 4 weeks ago

In the article about the Celtic Calendar and the quarter/cross-quarter days, there is an error in the one for Mid-summer's day. In it, it is said: June 24, Midsummer Day. "...Around the time of the summer solstice, this day was the midpoint of the growing season, halfway between planting and harvest. (The English church later celebrated this day as the birthday of John the Baptist, who foretold the birth of Jesus exactly six months later.) Folks celebrated by feasting, dancing, singing, and preparing for the hot summer days ahead. Learn more about Midsummer Day..."

But, if what is in the bible is correct, then John the Baptist is about six months older than Jesus and thus, could not have "foretold" of Jesus' birth six-months hence. In scripture, it also says that after Mary learned that she was to have Jesus at the Annunciation, and that her kinswomen Elizabeth was also expecting; Mary visited Elizabeth and the baby (John the Baptist to-be) "leapt in Elizabeth's womb."

Laura Edgerton (not verified)

7 months 1 week ago

To say that the Celtic Calendar was only used by Celts living in the British Isles is incorrect. The Celtic Calendar was used by the Celts in the Republic of Ireland, which is not a British Isle.