Tag Archives: Gregorian calendar

Welcome to April

WELCOME TO APRIL

 

April, Brevarium Grimani fol. 5v (Flemish)
Circa 1510
Venedig, Biblioteca Marciana
Public Domain via Wikimedia Commons

April is the fourth month and since the Romans noted the month as for sun and growth, named the month Aprillis. Its origins as a name are unclear but some believe it to be connected to the Greek goddess of love Aphrodite. On the old Roman calendar, it was the second month of the year as the new year began in March.

With winter over in the Northern Hemisphere, it is a time of many festivities to herald spring. April Fool’s Day, celebrated on April 1, is thought to have begun to celebrate winter’s end by playing joyful pranks on friends and neighbors. Two major religious observances occur in April, Easter and Passover. Both religions use the lunar calendar but in different ways to determine dates of observance. Passover must occur in the seventh month and on the 14th day at the full moon. The Western Christian church observes Easter after the first full moon (called the Paschal Moon) that comes after the March Equinox. This is not without some problems as often the astronomical and ecclesiastical date don’t sync up. The Council of Nicea in 325 A.D. determined that Easter Sunday would be celebrated after the March Equinox but allow enough time for a full moon to occur (22 March-25 April) for Easter to take place. Sometimes that full moon may occur right afterwards or later into April. When it occurs after the equinox, it is called a Lenten Moon.

As you might guess, this involves a lot of calculations (called Computus) to get everything properly set up for Lent and Easter Sunday for each liturgical year. Since the Western churches use the Gregorian calendar, it corrects the problems of the older Julian calendar during the solar year. Eastern Orthodox still uses the Julian calendar for its liturgical year, so its observance of Easter can fall a week or several weeks later. Every four years, both calendars align, and both observe Easter Sunday on the same date. Since Easter Sunday also determines public holidays in different countries, the dates for those holidays change each year as well.

The April full moon has many names in different cultures. Some places in North America called it the Pink Moon owing to a pink flower. Some Native American tribes called it the Breaking Moon as it meant the end of ice and the return of warmth. Others used animal names denoting animals returning from their winter homes.

Of course, there is a lot of folklore around the first moon in April. Here are some favorites:

A full Moon in April brings frost. If the full Moon rises pale, expect rain.

 “A cold April the barn will fill.”

(Old Farmer’s Almanac)

Suggested Reading

Bedard, Stephen. “How Is the Date for Easter Calculated? – History of Christianity.” History of Christianity. Last modified March 29, 2025. Accessed March 31, 2026. https://historyofchristianitypodcast.com/2025/03/28/how-is-the-date-for-easter-calculated/.

Boeckmann, Catherine. “April 2026 Calendar: Holidays, Weather & Spring Tips.” Almanac.Com. Last modified March 26, 2026. Accessed March 31, 2026. https://www.almanac.com/content/month-april-holidays-fun-facts-folklore.

“Rehberger, Georg. “The Month of April.” Accessed March 31, 2026. https://www.timeanddate.com/calendar/months/april.html.

Welcome to January

Photo of Head of Janus
Vatican Museum, Rome
Source: Loudon Dodd (via Wikimedia)

January is the first month on the Gregorian and the Julian calendar. It is named after the Roman god of doors, Janus, as this month is a doorway into the new year. Janus is an interesting Roman god as he is two-faced. Thus, he can see both the future and the past. In January, you can see the previous year and view the upcoming one. The old Roman calendar ended in December and did not start up till March. This was changed later with the addition of January to replace March but was made official when the Julian calendar was adopted in 8 BC. The new Julian calendar used the solar cycle rather than the lunar making it more accurate. Unfortunately, its creator Sosigenes, an Alexandrian astronomer who helped create the Egyptian solar calendar, made a small mathematical error of 11 minutes and 14 seconds. Small but significant as the calendar started going out of sync with the solar cycle over time making it hard to use for holy days that required a precise measurement in order to be done at the correct date and time.

Très Riches Heures du duc de Berry Folio 1, verso: January
Part of Très Riches Heures du duc de Berry by Limbourg brothers (fl. 1402–1416)
Public Domain via Wikimedia Commons

This became apparent by the Middle Ages and calls for it to be resolved became more urgent. It was no longer minutes but by then 10 days. This would ultimately result in the Gregorian Calendar (named for Pope Gregory XIII) that was adopted in 1548 by the Catholic church and the Papal States. This resolved the major problem regarding the scheduling of Easter. Since however this was a civic reform, it was up to each nation to decide whether to implement or not. It would gradually be adopted by many countries. Spain was the first to switch over and that included much of Roman Catholic Europe. Protestant countries were not keen on changing right away since the reform was made by the Catholic Church. The British would adopt it 1750 but by a method to avoid saying it was from the Catholic Church. Sweden adopted in 1753. Turkey would switch to using the fiscal year as Gregorian in 1917 and then for the entire calendar in 1926. Russia, under the Communist government, changed in 1918. Greece would change in 1923. Saudi Arabia would formally adopt it in 2016. The change between calendars was startling at first. You might be in November and suddenly thirteen days back in October!

Eastern Orthodox denominations decided for religious purposes to use the Julian rather than Gregorian for their liturgical year (separate from the civic calendar). Which is why in countries  like Greece or Russia the celebration of Christmas and Easter is currently 13 days after it is celebrated elsewhere.

Sources

Boeckmann, Catherine. “The Month of January 2026: Holidays, Fun Facts, Folklore.” Almanac.Com. Last modified December 9, 2025. https://www.almanac.com/content/month-january-holidays-facts-folklore.

Tikkanen, Amy. “Why Does the New Year Start on January 1?” Encyclopedia Britannica. Accessed December 31, 2025. https://www.britannica.com/story/why-does-the-new-year-start-on-january-1.

“The Month of January.” https://www.timeanddate.com/calendar/months/january.html

Welcome to December!

Très Riches Heures du duc de Berry Folio 12, December
circa 1440
Public Domain via Wikimedia Commons

December is the 12th month on the Gregorian calendar. The name derives from the Latin word decem, which means ten. It originally was the tenth and final month of the year on the old Roman calendar which began in March. With the adoption of the Julian calendar, January and February were added but the name remained. Anglo-Saxons used the word Yule for December-January but that now has been changed to mean December and Christmas season.

The December solstice is known as the Winter Solstice in the Northern Hemisphere, but it is the Summer Solstice in the southern. The solstice generally takes place around 21 -22 December and is the shortest day of the year in the north (the reverse in the south). Depending on how far north you are, sunlight may only be a few hours a day. And in some places, it is either dark or twilight for winter. Many old festivals took place to commemorate this event (and some still do to this day). For Christians, the first four weeks before Christmas is Advent in which they prepare for the birth of Jesus on 25 December. Jews celebrate Chanukah/Hanukkah, the 8-day Festival of Lights in December as well.

The first full moon of December is often called the Cold Moon in some places but has many other names as well depending on the culture and people that observed and followed the lunar schedule. The Geminid Meteor Shower takes place on 13-14 December. The Ursid Meteor Shower is on 22-23 December.

Sources

Boeckmann, Catherine. “The Month of December 2025: Holidays, Fun Facts, Folklore.” Almanac.Com. Last modified November 21, 2025. Accessed November 30, 2025. https://www.almanac.com/content/month-of-december-holidays-facts-folklore.

Kennedy, Lesley  “The Surprising History of December,” HISTORY, last modified November 24, 2025, accessed November 30, 2025, https://www.history.com/articles/december-month-history-facts.

“The Month of December.” https://www.timeanddate.com/calendar/months/december.html.

Welcome to June

June calendar from the Très Riches Heures du Duc de Berry
From Très Riches Heures du duc de Berry Folio 6, verso: June
Between 1412 and 1416, circa 1440 or between 1485 and 1486
Public Domain via Wikimedia Commons

 

Welcome to June! June is the 6th month on the Gregorian and Julian calendars and is one of four months with 30 days long. It marks the beginning of summer in the Northern Hemisphere and winter in the Southern Hemisphere. The Summer Solstice takes place between June 20-22 and is the longest day of the year. June comes from the Latin Iunius, possibly named for the goddess Juno, and on the old Roman calendar was the fourth month of the year.

Midsummer is celebrated on either the Summer Solstice or St. John’s Day (24 June) in Denmark, Finland, Norway, Sweden, Estonia, Latvia, and Lithuania. Father’s Day is observed globally but with varying dates. The U.S. observes it on the 3rd Sunday in June. Juneteenth, a U.S. federal holiday on June 19, commemorates the Emancipation Proclamation read in Galveston, Texas, freeing enslaved people.

June is popular for weddings and celebrations, a tradition that comes from Roman times when marrying in June was considered lucky. The birthstones are pearl, alexandrite, and moonstone, with rose and honeysuckle as the flowers. Though summer officially begins at the solstice, it is considered to start at the beginning of June for commercial and agricultural purposes

For More Information

Welcome to May

May, from the Très Riches Heures du Duc de Berry (1412-1416)
Limbourg brothers (fl. 1402–1416)
Public Domain (Wikimedia Commons)

May, the fifth month in the Gregorian and Julian calendars, is named after the Greek goddess Maia. It was the third month in the Roman calendar and has 31 days. The full moon in May, often called the Flower Moon, coincides with blooming flowers.

Bouquet of beautiful red roses
Davidjose365, May 2015
Wikimedia Commons

May is associated with spring in the Northern Hemisphere and autumn in the Southern Hemisphere. As a bridge between spring and summer, it has varying hot and cold days by location. The saying “Warm January, cool May” is sometimes true. In the past, homes were sealed for winter, but in May, windows were opened to let in warm spring air. Spring cleaning remains a tradition to freshen homes after winter. In *The Beverly Hillbillies*, Granny cleaned the mansion thoroughly, placing items outside.

A sure sign spring is here is when lambs appear.
Spring Lamb In The Sunshine
Photo: Tanya Hall/publicdomainpictures.net

Spring is when plants start growing, and many festivals celebrate this season. Ancient Romans held several in May, and many Europeans still do. Late May often marks the start of summer. May’s symbols are the emerald (birthstone), lily of the valley, and hawthorn (birth flowers).

For more information

Catherine Boeckmann, “The Month of May 2025: Holidays, Fun Facts, Folklore,” Almanac.Com, last modified April 23, 2025, https://www.almanac.com/content/month-may-holidays-fun-facts-folklore.

“The Month of May,” https://www.timeanddate.com/calendar/months/may.html.

Wikipedia contributors, “May,” Wikipedia, last modified April 21, 2025, https://en.wikipedia.org/wiki/May.

 

Welcome to April

April, Brevarium Grimani fol. 5v (Flemish)
Circa 1510
Venedig, Biblioteca Marciana
Public Domain via Wikimedia Commons

April is the fourth month on the current Gregorian and Julian calendar. On the old Roman calendar, it was the second month after March since there was no January or February. In the Northern Hemisphere, April is the first month of spring while in the Southern, it is fall. Since the month was seen as a month of sun and and growth, the Romans named the month Aprillis. The name possibly is connected to the Greek goddess Aphrodite, but its origin is unclear. However, the name has stuck and called today April.

With winter over in the Northern Hemisphere, it is a time of joy the days get warmer. The cold days of rain, snow, and frost begin to recede in earnest in most places though the further north you are, it will hold out for a bit longer. April is known for countless festivities to herald this time of year. Of course, April 1 is April Fool’s Day, which is celebrated globally as a day of playing pranks. It is thought that it began as a way to celebrate the end of winter since people would be happy to see it go. So, playing joyful pranks on friends and neighbors would occur. April also is often a time of two major celebrations for Christianity and Judaism: Easter and Passover.

The first full moon in April has both religious and secular meanings. Since Jews use a lunar calendar, Passover occurs in the seventh month and on the 14th day at the full moon. The Western Christian church generally observes Easter after the first full moon after the Vernal Equinox in March. Thus, the first Sunday after the Paschal Moon is when Easter Sunday will be observed. Sometimes Easter and Passover will be celebrated at nearly the same time. However sometimes the astronomical date and the ecclesiastical date do not always sync up. At the Council of Nicea in 325 AD, it was decided Easter Sunday would be celebrated on the first Sunday after the Vernal Equinox (usually March 21). It was further decided that Easter Sunday, to accommodate a full moon right after the equinox, would be celebrated between March 22 up to April 25. Sometimes Easter Sunday will occur March since the full moon (sometimes called the Lenten Moon in this case) occurs right after the equinox.

As you might guess, this involves a lot of calculations (called Computus) to get everything properly set up for Lent and Easter Sunday for each liturgical year. Since the Western churches use the Gregorian calendar, it corrects the problems of the older Julian calendar during the solar year. Eastern Orthodox still uses the Julian calendar for its liturgical year, so its observance of Easter can fall a week or several weeks later. Every four years, both calendars align, and both observe Easter Sunday on the same date. Since Easter Sunday also determines public holidays in different countries, the dates for those holidays change each year as well.

Other cultures had different names for the April moon. One is the Pink Moon. This was used in some places in North America. It did not denote the moon was pink but that a certain flower turned pink in April. Breaking Moon was used by Native Americans in Dakota as the return of warmth meant the end of ice. Names were sometimes connected to when certain animals returned from their winter retreats (Moon When Ducks Return etc.)

Of course, there is a lot of folklore around the first moon in April. Here are some favorites:

A full Moon in April brings frost. If the full Moon rises pale, expect rain.

“A cold April the barn will fill.”
(Old Farmer’s Almanac)

Suggested Reading

Catherine Boeckmann, “The Month of April 2025: Holidays, Fun Facts, Folklore,” Almanac.Com, last modified March 21, 2025, https://www.almanac.com/content/month-april-holidays-fun-facts-folklore.

“The Month of April,” https://www.timeanddate.com/calendar/months/april.html.

Stephen Bedard, “How Is the Date for Easter Calculated? – History of Christianity,” History of Christianity, last modified March 29, 2025, https://historyofchristianitypodcast.com/2025/03/28/how-is-the-date-for-easter-calculated/.

Welcome to March

Très Riches Heures du duc de Berry Folio 3, verso: March Part of Très Riches Heures du duc de Berry Date between 1412 and 1416 and circa 1440 Conde Museum, France Public Domain (US) via Wikimedia Commons

March is the third month on both the old Julian and current Gregorian calendar. It is the month that begins spring in the Northern Hemisphere and autumn in the Southern Hemisphere. March is believed to be derived from the Roman god Mars (Greek equivalent Ares). Before the advent of the Julian calendar, Romans considered March the first month of the new year. With winter over, it was also the start of military campaigns to resume. Festivals were also held at this time in ancient Rome to honor Mars as well.

The March equinox is usually around March 21-22. Many spring festivals take place in March. Passover and Easter may take place in March, but not always as it is dependent upon very specific calculations and can change from year to year. St. Patrick’s Day is celebrated on March 17. If it falls on a Friday, Catholics are given dispensation to eat meat on that day (at least in Ireland and in areas where the feast is celebrated) If it falls on a Sunday, the diocese that observes the day will do so on Monday. For Ireland, since St. Patrick is its patron saint, it will be celebrated on Sunday replacing the normally observed day of Lent.

St. Patrick’s Day postcard, 1912 of “Old Weir Bridge” at Dinis Cottage, in Killarney National Park, Ireland.
Public Domain/Wikipedia

The famous Ides of March (March 15) was once a day to pay debts in Rome, but it became infamously associated with the assassination of Julius Caesar on that day in 44 BC. Daylight Saving Time begins in the U.S. and Canada on the second Sunday in March. For most of Europe, this will occur on March 31. The first full moon of March is often called the Worm Moon as many earthworms are being noticed in the Northern Hemisphere.

For Further Information

———. “The Month of March 2025: Holidays, Fun Facts, Folklore.” Almanac.Com. Last modified February 19, 2025. https://www.almanac.com/content/month-march-holidays-fun-facts-folklore.

“The Month of March,” last modified February 20, 2025, https://www.timeanddate.com/calendar/months/march.html.

Byrd, Deborah, and Deborah Byrd. “March Equinox 2025: All You Need to Know.” EarthSky | Updates on Your Cosmos and World. Last modified December 12, 2024. https://earthsky.org/astronomy-essentials/everything-you-need-to-know-vernal-or-spring-equinox/.

Welcome to February

February by Leandro Bassano,1595/1600
Public Domain (via Wikimedia Commons)

February is the second month on the Gregorian and Julian calendars. With 28 days (except in leap years when there are 29), it is the shortest month of the year. On the old Roman calendar, the year ended in December, and the new year started in March. The name is derived from Februarius, a purification ritual that was held around 15 February on the old Roman lunar calendar. While in the northern hemisphere February is still winter heading towards spring, in the southern seasons are switched so they are heading towards autumn.

With shorter number of days, it is the one month that can pass without a full moon (it happened in 2018). There are many fascinating names used during the month such as Snow Moon to indicate snow is on the ground. Some Native American tribes call it the Hunger Moon due to limited food sources during winter.

February is considered the snowiest month of winter, though that can of course vary by the year. 2 February has been set aside (for reasons far longer than be put here) as a day for weather forecasting by various animals. The most famous is of course Punxsutawney Phil and if the groundhog sees his shadow then six weeks more of winter is expected. He is rated by the U.S. National Oceanic and Atmospheric Administration (NOAA) as being accurate 40% of the time.  A lot of people trek to see the groundhog in Punxsutawney, Pennsylvania so it has become quite an event. The whole idea comes from German settlers who back in Germany used badgers for the same purpose. Lacking badgers here, groundhogs were used and so the whole thing mushroomed into what it is today.

There is also a religious connection to 2 February. In most Christian churches, 2 February is celebrated as either Candlemas (the old name) or Presentation of the Lord. The faithful will bring candles to be blessed to be used during winter (and beyond as needed). And then the day is celebrated as also when the infant Jesus is brought to the temple in Jerusalem to be presented in accordance with the law of Moses. There Simeon, a prophet who had been told he would see the promised messiah before he died, took the infant into his arms and blessed him:

Now thou dost dismiss thy servant, O Lord, according to thy word in peace; Because my eyes have seen thy salvation, Which thou hast prepared before the face of all peoples: A light to the revelation of the Gentiles, and the glory of thy people Israel. And his father and mother were wondering at those things which were spoken concerning him. And Simeon blessed them, and said to Mary his mother: Behold this child is set for the fall, and for the resurrection of many in Israel, and for a sign which shall be contradicted; And thy own soul a sword shall pierce, that, out of many hearts, thoughts may be revealed. (Luke 2:25-35)

The February flowers are violet (to signify loyalty, faithfulness and watchfulness) and the primrose (to let someone know you cannot be without them). Of course, roses are the unofficial flower since Valentine’s Day on 14 February usually means a lot of roses are purchased for wives and girlfriends.

For More Information

Boeckmann, Catherine. “February Calendar 2025: Holidays, Fun Facts, and Folklore.” Almanac.Com. Last modified January 29, 2025. https://www.almanac.com/content/month-february-holidays-fun-facts-folklore.

“The Month of February,” https://www.timeanddate.com/calendar/months/february.html.

Contributors to Wikimedia projects, “1911 Encyclopædia Britannica/February,” Wikisource, the Free Online Library, last modified August 14, 2020, https://en.wikisource.org/wiki/1911_Encyclop%C3%A6dia_Britannica/February.

Cecil Adams, “How Come February Has Only 28 Days? – the Straight Dope,” The Straight Dope, last modified July 28, 2020, https://www.straightdope.com/21341610/how-come-february-has-only-28-days.

Welcome to January

Photo of Head of Janus
Vatican Museum, Rome
Source: Loudon Dodd (via Wikimedia)

January is the first month on the Gregorian and the Julian calendar. It is named after the Roman god of doors, Janus, as this month is a doorway into the new year. Janus is an interesting Roman god as he is two-faced. Thus, he can see both the future and the past. In January, you can see the previous year and view the upcoming one. The old Roman calendar ended in December and did not start up till March. This was changed later with the addition of January to replace March but was made official when the Julian calendar was adopted in 8 BC. The new Julian calendar used the solar cycle rather than the lunar making it more accurate. Unfortunately, its creator Sosigenes, an Alexandrian astronomer who helped create the Egyptian solar calendar, made a small mathematical error of 11 minutes and 14 seconds. Small but significant as the calendar started going out of sync with the solar cycle over time making it hard to use for holy days that required a precise measurement in order to be done at the correct date and time.

Très Riches Heures du duc de Berry Folio 1, verso: January
Part of Très Riches Heures du duc de Berry by Limbourg brothers (fl. 1402–1416)
Public Domain via Wikimedia Commons

This became apparent by the Middle Ages and calls for it to be resolved became more urgent. It was no longer minutes but by then 10 days. This would ultimately result in the Gregorian Calendar (named for Pope Gregory XIII) that was adopted in 1548 by the Catholic church and the Papal States. This resolved the major problem regarding the scheduling of Easter. Since however this was a civic reform, it was up to each nation to decide whether to implement or not. It would gradually be adopted by many countries. Spain was the first to switch over and that included much of Roman Catholic Europe. Protestant countries were not keen on changing right away since the reform was made by the Catholic Church. The British would adopt it 1750 but by a method to avoid saying it was from the Catholic Church. Sweden adopted in 1753. Turkey would switch to using the fiscal year as Gregorian in 1917 and then for the entire calendar in 1926. Russia, under the Communist government, changed in 1918. Greece would change in 1923. Saudi Arabia would formally adopt it in 2016. The change between calendars was startling at first. You might be in November and suddenly thirteen days back in October!

Eastern Orthodox denominations decided for religious purposes to use the Julian rather than Gregorian for their liturgical year (separate from the civic calendar). Which is why in countries  like Greece or Russia the celebration of Christmas and Easter is currently 13 days after it is celebrated elsewhere.

For Further Information

Amy Tikkanen, “Why Does the New Year Start on January 1?,” Encyclopedia Britannica, https://www.britannica.com/story/why-does-the-new-year-start-on-january-1.

“The Month of January,” https://www.timeanddate.com/calendar/months/january.html.

Catherine Boeckmann, “The Month of January 2025: Holidays, Fun Facts, Folklore,” Almanac.Com, last modified January 2, 2025, https://www.almanac.com/content/month-january-holidays-facts-folklore.

Welcome to December

[This has been updated from 2023 with new information, additional images, and sources]

Très Riches Heures du duc de Berry Folio 12, December
circa 1440
Public Domain via Wikimedia Commons

December is the 12th month on the Gregorian calendar. The name derives from the Latin word decem, which means ten. It originally was the tenth and final month of the year on the old Roman calendar which began in March. With the adoption of the Julian calendar, January and February were added but the name remained. Anglo-Saxons used the word Yule for December-January but that now has been changed to mean December and Christmas season.

The December solstice is known as the Winter Solstice in the Northern Hemisphere, but it is the Summer Solstice in the southern. The solstice generally takes place around 21 -22 December and is the shortest day of the year in the north (the reverse in the south). Depending on how far north you are, sunlight may only be a few hours a day. And in some places, it is either dark or twilight for winter. Many old festivals took place to commemorate this event (and some still do to this day). For Christians, the first four weeks before Christmas is Advent in which they prepare for the birth of Jesus on 25 December. Jews celebrate Chanukah/Hanukkah, the 8-day Festival of Lights in December as well.

The first full moon of December is often called the Cold Moon in some places but has many other names as well depending on the culture and people that observed and followed the lunar schedule. The Geminid Meteor Shower takes place on 13-14 December. The Ursid Meteor Shower is on 22-23 December.

For More Information

Catherine Boeckmann, “The Month of December 2024: Holidays, Fun Facts, Folklore,” Almanac.Com, last modified December 2, 2024, https://www.almanac.com/content/month-of-december-holidays-facts-folklore.

“The Month of December.” https://www.timeanddate.com/calendar/months/december.html.

Mariah Thomas, “December Holidays and Observances to Celebrate Year After Year,” Reader’s Digest, last modified November 4, 2024, https://www.rd.com/article/december-holidays/.