Articles About Calendar (88)
![Deer in a grassy field at dawn.](http://webcf.waybackmachine.org/web/20210812044555im_/https://c.tadst.com/gfx/150x84/hunters-moon.jpg?1)
The Hunter's Moon
October’s Full Moon is the Hunter’s Moon. It's also called Travel Moon, Dying Grass Moon, Blood Moon, or Sanguine Moon.
![Illustration image](http://webcf.waybackmachine.org/web/20210812044555im_/https://c.tadst.com/gfx/150x84/istock-calendar-days.jpg?1)
The 7 Days of the Week
The 7-day week is the international standard that is used by the majority of the world. There are 52 or 53 weeks in a year, but countries vary on how they count the weeks.
![The Full Moon behind three horses.](http://webcf.waybackmachine.org/web/20210812044555im_/https://c.tadst.com/gfx/150x84/farmers-almanac-horses.jpg?1)
Full Moon Names
Full Moons had given names in many ancient cultures. The Full Moon names we use today often reflect nature like Harvest Moon.
![Zoomed in image of the Full Moon with its surface of craters and mountains.](http://webcf.waybackmachine.org/web/20210812044555im_/https://c.tadst.com/gfx/150x84/full-moon-phase2.jpg?1)
Full Moon – the Moonlight Phase
The 3rd primary phase of the Moon, the Full Moon is the moment its disk is illuminated by the Sun's rays.
![Leap Year 366 Days Illustration image](http://webcf.waybackmachine.org/web/20210812044555im_/https://c.tadst.com/gfx/150x84/leap-year-366-days.png?1)
What Is a Leap Year?
A leap year has 366 days, as opposed to a common year, which has 365. Nearly every four years is a Leap Year, and we add a leap day, an extra day on February 29.
![Tourists visiting the Papal Basilica of St. Peter in the Vatican City Rome, Italy - November 2015. Tourists visiting the Papal Basilica of St. Peter in the Vatican City Rome, Italy - November 14, 2015](http://webcf.waybackmachine.org/web/20210812044555im_/https://c.tadst.com/gfx/150x84/italy-rome-vatican-.jpg?1)
The Gregorian Calendar
The Gregorian calendar is the internationally accepted civil calendar that was first adopted in 1582.
![New Moon Phase Illustration of the Moon's position in space in relation to Earth and the Sun at New Moon.](http://webcf.waybackmachine.org/web/20210812044555im_/https://c.tadst.com/gfx/150x84/new-moon-phase.png?1)
The New Moon
When is the next New Moon? New Moon is when the Sun and Moon are aligned, with the Sun and Earth on opposite sides of the Moon.
![Illustration image](http://webcf.waybackmachine.org/web/20210812044555im_/https://c.tadst.com/gfx/150x84/istock-545593812.jpg?1)
How Does the Mayan Calendar Work?
The Maya calendar consists of a system of three interlacing calendars and almanacs which was used by several cultures in Central America, most famously the Maya civilization.
![Chinese lions dance to the firecrackers in Chinatown of Washington D.C. for the annual Chinese New Year celebration.](http://webcf.waybackmachine.org/web/20210812044555im_/https://c.tadst.com/gfx/150x84/chinese-calendar-new-year.jpg?1)
The Chinese Calendar
The Chinese calendar is one of the oldest calendars in modern society. It is a lunisolar calendar.
![Julius Caesar bust Ancient Roman General Julius Caesar](http://webcf.waybackmachine.org/web/20210812044555im_/https://c.tadst.com/gfx/150x84/julius-caesar-bust.jpg?1)
The Julian Calendar
The Julian calendar reformed the ancient Roman calendar and consists of three cycles of 365-day years followed by a 366-day leap year. Introduced by and named after Julius Caesar in 45 BCE.
![The ancient city of Pompeii, Italy was founded around 600-700 BCE and destroyed by a volcanic eruption of Mount Vesuvius in 79 CE. Tourists visit the ruins of the ancient city of Pompeii, Italy.](http://webcf.waybackmachine.org/web/20210812044555im_/https://c.tadst.com/gfx/150x84/ruins-pompeii-italy-volcano.jpg?1)
What Do CE and BCE Mean?
CE is an abbreviation for Common Era and BCE is short for Before Common Era.
![Full Moon peeking through branches. Blue and foggy background.](http://webcf.waybackmachine.org/web/20210812044555im_/https://c.tadst.com/gfx/150x84/full-moon-peeking-tree-branches-fog.jpg?1)
What Is a Blue Moon?
'Once in a blue moon', suggests something is very rare. But just how rare is a Blue Moon?
![June solstice illustration Earth's position in relation to the Sun's rays at the June solstice.](http://webcf.waybackmachine.org/web/20210812044555im_/https://c.tadst.com/gfx/150x84/june-solstice-dark.png?1)
June Solstice
The June solstice is the longest day of the year in the Northern Hemisphere & the shortest day in the Southern Hemisphere.
![An Easter Sunday date in the calendar Illustration image](http://webcf.waybackmachine.org/web/20210812044555im_/https://c.tadst.com/gfx/150x84/easter-date-calendar.jpg?1)
Calculating the Easter Date
The date of Easter Day depends on age-old approximations of the Full Moon and the March equinox.
![Month of October Month of October](http://webcf.waybackmachine.org/web/20210812044555im_/https://c.tadst.com/gfx/150x84/the-month-october.jpg?1)
The Month of October
October is the tenth month of the year and has 31 days. It was originally the eighth month of the Roman calendar until 153 BCE.
![Harvest Supermoon rises over the campus of West Virginia University in Morgantown WV on November 13, 2016.](http://webcf.waybackmachine.org/web/20210812044555im_/https://c.tadst.com/gfx/150x84/harvest-moon-supermoon.jpg?1)
Harvest Moon in September or October?
The Harvest Moon varies between September or October in the Northern Hemisphere. It is the Full Moon nearest the autumnal (fall) equinox.
![Underside of an airplane visible in front of a half Moon during the day with a blue sky in the background.](http://webcf.waybackmachine.org/web/20210812044555im_/https://c.tadst.com/gfx/150x84/plane-front-of-half-moon.jpg?1)
First Quarter Moon
The 1st Quarter Moon is a primary Moon phase when we can see exactly half of the Moon's surface lit up. Which half depends on where you are on Earth.
![Today, women can ask a man to marry her. Today, women can ask a man to marry her.](http://webcf.waybackmachine.org/web/20210812044555im_/https://c.tadst.com/gfx/150x84/sadie-hawkins-day-fun.jpg?1)
Leap Day February 29
When is the next Leap Year? A Leap Year consists of 366 days – not 365 – where February 29 is added as an extra day at the end of February.
![A Waxing Crescent Moon in the evening.](http://webcf.waybackmachine.org/web/20210812044555im_/https://c.tadst.com/gfx/150x84/crescent-moon-waxing.jpg?1)
The Islamic Calendar
Over 1.7 billion Muslims around the world observe the Islamic calendar or Hijri calendar. How does it work and why are the lengths of Islamic months so difficult to predict?
![Bronze statue of Bolognese Pope Gregory XIII in Accursio Palace Bologna](http://webcf.waybackmachine.org/web/20210812044555im_/https://c.tadst.com/gfx/150x84/pope-gregory.jpg?1)
Gregorian Calendar Reform: Why Are Some Dates Missing?
The Gregorian calendar was first introduced in 1582, however, different countries changed from the Julian Calendar at different times. Why were some days skipped?
![Illustration image](http://webcf.waybackmachine.org/web/20210812044555im_/https://c.tadst.com/gfx/150x84/roman-calendar.jpg?1)
The Roman Calendar
The Roman calendar is is the grandfather of our modern calendar.
![A Last Quarter Moon is sometimes called a Half Moon. A Last Quarter Moon, also called Half Moon, where the left half of the Moon is lit up.](http://webcf.waybackmachine.org/web/20210812044555im_/https://c.tadst.com/gfx/150x84/third-quarter-moon-half.jpg?1)
Third Quarter Moon
The Third or Last Quarter Moon is when the opposite half of the Moon is illuminated compared to the First Quarter.
![Illustration image](http://webcf.waybackmachine.org/web/20210812044555im_/https://c.tadst.com/gfx/150x84/5weekend-hoax.png?1)
The 823-Year Myth
5 Fridays, 5 Saturdays, and 5 Sundays in the same month happens only every 823 years? This popular urban myth is precisely that: a myth.
![A swimming beaver.](http://webcf.waybackmachine.org/web/20210812044555im_/https://c.tadst.com/gfx/150x84/beaver-moon.jpg?1)
November: Beaver Moon
The Full Moon in November is named after beavers. It is also called Frost Moon and Mourning Moon, depending on the winter solstice.
![Illustration image](http://webcf.waybackmachine.org/web/20210812044555im_/https://c.tadst.com/gfx/150x84/full-moon.jpg?1)
Monday: the Moon’s Day
Monday is the first day of the week according to the international standard, but in the US, Canada, and Japan it is the second day of the week.
![A palindrome reads the same backwards and forwards, like 'BOB' Palindrome](http://webcf.waybackmachine.org/web/20210812044555im_/https://c.tadst.com/gfx/150x84/palindrome-bob.png?1)
Palindrome Day
A Palindrome Day happens when the day’s date can be read the same way backward and forward. The dates are similar to word palindromes in that they are reversible. Depending on the date format Palindrome Days can be rare.
![The exterior of Ras Makkonen Selassie church in Harar, Ethiopia.](http://webcf.waybackmachine.org/web/20210812044555im_/https://c.tadst.com/gfx/150x84/ethiopian-church-calendar.jpg?1)
The Ethiopian Calendar
The Ethiopian calendar is quite similar to the Julian calendar, which was the predecessor to the Gregorian calendar most countries use today.
![The statue of the lion of Babylon was discovered in 1876. It is considered among the most important symbols of Babylon. 3 men next to the black basalt statue of the lion of Babylon which depicts a lion standing above a laying human in today's Iraq. March 20, 2015.](http://webcf.waybackmachine.org/web/20210812044555im_/https://c.tadst.com/gfx/150x84/statue-lion-babylon-iraq.jpg?1)
Why Does a Week Have 7 Days?
It's Monday, you have to wait 5 days till the weekend. Why does a week have 7 days, and why in that order? Thank the Moon and an ancient people in today's Iraq.
![Torah scroll](http://webcf.waybackmachine.org/web/20210812044555im_/https://c.tadst.com/gfx/150x84/torah-scroll.jpg?1)
The Jewish Calendar
The Jewish calendar is designed to keep in sync with Sun and Moon cycles while also satisfying religious requirements. Sounds complicated? Well, it is! Find out how it works.
![Illustration image](http://webcf.waybackmachine.org/web/20210812044555im_/https://c.tadst.com/gfx/150x84/space-earth-sun.jpg?1)
How Accurate Are Calendars?
Our calendar does not accurately reflect the length of a tropical year, the time it takes Earth to complete a full orbit around the Sun. Why is that so and are there other calendars that do a better job?
![Dark New Moon night with the star filled sky in the background and fir trees in the foreground.](http://webcf.waybackmachine.org/web/20210812044555im_/https://c.tadst.com/gfx/150x84/starry-night-sky-forest.jpg?1)
What Is a Black Moon?
A Black Moon can be the third New Moon in a season with four New Moons or the second New Moon in the same calendar month, or even no New Moon at all.
![Fireworks at night over a bridge. Boats on the river under the bridge.](http://webcf.waybackmachine.org/web/20210812044555im_/https://c.tadst.com/gfx/150x84/fireworks-night-sydney.jpg?2)
When Did the 21st Century Start?
When did the 3rd millennium and 21st century begin: on New Year's Day 2000 or 2001? Do we count from year 1 or year 0 AD? What century are we in?
![Illustration image](http://webcf.waybackmachine.org/web/20210812044555im_/https://c.tadst.com/gfx/150x84/special-date-11-11-11.png?1)
11/11/11 – a date with a special meaning?
The meaning of dates, such as 11/11/11, is becoming more popular since the start of the new millennium.
![Calendar page flipping sheet close up with blurred background.](http://webcf.waybackmachine.org/web/20210812044555im_/https://c.tadst.com/gfx/150x84/calendar-common-year.jpg?1)
What is a Common Year?
A common year is a calendar year with 365 days and only 28 days in February.
![White bust of the two-faced Roman god, Janus, in the Summer Garden in Saint - Petersburg, Russia, founded by Peter the Great.](http://webcf.waybackmachine.org/web/20210812044555im_/https://c.tadst.com/gfx/150x84/roman-god-janus.jpg?1)
The Month of January
January has 31 days, and is named after the two-faced Roman god Janus.
![A close-up of the thin sliver of a yellow waning crescent moon.](http://webcf.waybackmachine.org/web/20210812044555im_/https://c.tadst.com/gfx/150x84/waning-crescent-moon-yellow.jpg?1)
Waning Crescent Moon
During the Waning Crescent Moon phase, the lit-up part of the Waning Moon shrinks from the Third Quarter Moon until it disappears from view at New Moon.
![30 February Sweden Illustration image](http://webcf.waybackmachine.org/web/20210812044555im_/https://c.tadst.com/gfx/150x84/30-feb-sweden.png?1)
February 30
February 30 actually existed at least twice in the past, according to historical records.
![a young girl doing a simple calculation on a blackboard smiling at the fotographer.](http://webcf.waybackmachine.org/web/20210812044555im_/https://c.tadst.com/gfx/150x84/doomsday-rule.jpg?1)
The Doomsday Algorithm - Calculating the Weekday of any given Date
Some dates fall on the same weekday every year. Use this knowledge to calculate the weekday of any date in your head.
![Month of February Month of February](http://webcf.waybackmachine.org/web/20210812044555im_/https://c.tadst.com/gfx/150x84/the-month-february.jpg?1)
The Month of February
February is the second month of the year in the Gregorian calendar. It is the shortest month with only 28 days in common years and 29 days in leap years.
![Month of November Month of November](http://webcf.waybackmachine.org/web/20210812044555im_/https://c.tadst.com/gfx/150x84/the-month-november.jpg?1)
The Month of November
November is the 11th month of the year and has 30 days. It was originally the 9th month of the Roman calendar until 153 BCE.
![Thor's hammer Mjölnir. Necklace pendant shaped like Thor's hammer Mjölnir.](http://webcf.waybackmachine.org/web/20210812044555im_/https://c.tadst.com/gfx/150x84/thor-hammer-mjollner.jpg?1)
Thursday Is Thor's Day
Thursday is named after Thor, the hammer-wielding Norse god of thunder. It is the fourth day of the week between Wednesday and Friday.
![A howling lone gray wolf in snow-covered landscape.](http://webcf.waybackmachine.org/web/20210812044555im_/https://c.tadst.com/gfx/150x84/howling-wolf-snow.jpg?1)
January: Wolf Moon
The January Full Moon is named after howling wolves. In some cultures, it was known as Old Moon, Ice Moon, Snow Moon, and the Moon after Yule.
![Several pairs of colorful fashionable ladies gloves on display.](http://webcf.waybackmachine.org/web/20210812044555im_/https://c.tadst.com/gfx/150x84/pair-gloves-leap-day-refusal.jpg?1)
Leap Day Customs
Learn more about Leap Day traditions, superstitions and folklore.
![Illustration showing all the different Moon phases next to one another](http://webcf.waybackmachine.org/web/20210812044555im_/https://c.tadst.com/gfx/150x84/moon-phases-together.jpg?1)
The Lunar Month
A lunar month is the time it takes the Moon to pass through all of the Moon phases, usually measured from a New Moon the next New Moon.
![Month of September Month of September](http://webcf.waybackmachine.org/web/20210812044555im_/https://c.tadst.com/gfx/150x84/the-month-september.jpg?1)
The Month of September
September is the ninth month of the year in and has 30 days. It was originally the seventh month of the Roman calendar until 153 BCE.
![Calendar page](http://webcf.waybackmachine.org/web/20210812044555im_/https://c.tadst.com/gfx/150x84/leap-year-capital.jpg?1)
The Doomsday Rule
Some dates fall on the same weekday every year. Use this knowledge to calculate the weekday of any given date in your head.
![The Sun rising above a green field. Sunrise above a green field with scattered clouds in a blue sky sky.](http://webcf.waybackmachine.org/web/20210812044555im_/https://c.tadst.com/gfx/150x84/sunrise.png?1)
Sunday: the Sun's Day
Sunday is the seventh day of the week according to the international standard. However, many countries count Sunday as the first day of the week.
![Special dates in the Gregorian Calendar. Special dates in the Gregorian Calendar.](http://webcf.waybackmachine.org/web/20210812044555im_/https://c.tadst.com/gfx/150x84/special-dates-typography.jpg?1)
Special Calendar Dates
Learn more about numerically unique calendar dates such as sequential dates, same number dates, and palindrome (reversible) dates
![Month of August Illustration image](http://webcf.waybackmachine.org/web/20210812044555im_/https://c.tadst.com/gfx/150x84/month-of-august.jpg?1)
The Month of August
August is the eighth month of the year in the Gregorian calendar and is named after Augustus Caesar.
![Month of March Month of March](http://webcf.waybackmachine.org/web/20210812044555im_/https://c.tadst.com/gfx/150x84/the-month-march.jpg?1)
The Month of March
March is the third month of the year. It has 31 days and is named after Mars, the Roman god of war.
![Month of December Month of December](http://webcf.waybackmachine.org/web/20210812044555im_/https://c.tadst.com/gfx/150x84/the-month-december.jpg?1)
The Month of December
December is the twelfth month of the year and has 31 days. It was originally the tenth month of the Roman calendar until 153 BCE.
![Illustration image](http://webcf.waybackmachine.org/web/20210812044555im_/https://c.tadst.com/gfx/150x84/magha-puja-buddhist.jpg?1)
The Buddhist Calendar
Buddhists around the world use a lunisolar calendar system to determine the dates of Buddhist festivals. It is not to be confused with the Thai calendar. How does it work?
![Moonrise over alpine peaks in Utah.](http://webcf.waybackmachine.org/web/20210812044555im_/https://c.tadst.com/gfx/150x84/cold-moon.jpg?1)
December: Cold Moon
The December Full Moon is called the Cold Moon, Long Nights Moon, the Moon before Yule, Oak Moon, and Wolf Moon.
![On a 5th wedding anniversary, tradition dictates a gift made from wood, like this gilded trinket box. Save Download Preview A handmade gilded trinket box with vase and flower on a shabby chic background.](http://webcf.waybackmachine.org/web/20210812044555im_/https://c.tadst.com/gfx/150x84/wooden-gilded-trinket-box.jpg?1)
Anniversary and Birthday Traditions Around the World
Anniversaries and birthdays are celebrated differnetly in different cultures around the world.
![Sturgeon photographed underwater.](http://webcf.waybackmachine.org/web/20210812044555im_/https://c.tadst.com/gfx/150x84/sturgeon-fish.jpg?1)
August: Sturgeon Moon
The Full Moon in August is named after the lake sturgeon. Other names for this Full Moon include Grain Moon, Green Corn Moon, Fruit Moon, and Barley Moon.
![Month of June Month of June](http://webcf.waybackmachine.org/web/20210812044555im_/https://c.tadst.com/gfx/150x84/the-month-june.jpg?1)
The Month of June
June is the sixth month of the year, has 30 days, and is named after the Roman goddess Juno.
![American flag flying next to an Orthodox church in Los Angeles, California USA. Illustration image](http://webcf.waybackmachine.org/web/20210812044555im_/https://c.tadst.com/gfx/150x84/american-orthodox-church.jpg?1)
The Revised Julian Calendar
The Revised Julian calendar is one of the most accurate calendar systems ever developed. How does it work, and why don't we use it?
![Month of July Month of July](http://webcf.waybackmachine.org/web/20210812044555im_/https://c.tadst.com/gfx/150x84/the-month-july.jpg?1)
The Month of July
July is the seventh month of the year, has 31 days, and is named after Julius Caesar.
![Odin hadde to ravner, Hugin og Munin, som fløy rundt og holdt øye med menneskene. Tree filled with an unkindness of ravens](http://webcf.waybackmachine.org/web/20210812044555im_/https://c.tadst.com/gfx/150x84/ravens-in-tree.jpg?1)
Wednesday: Odin's Day
Wednesday is the third day of the week, and it is named after Odin, the Norse allfather-god who sent his ravens to Earth to keep an eye on people.
![Month of April Month of April](http://webcf.waybackmachine.org/web/20210812044555im_/https://c.tadst.com/gfx/150x84/the-month-april.jpg?1)
The Month of April
The month of April explained. How many days are in April? Why is April the 4th month? What meaning and symbolism does it have?
![Girl with birthday cake and candles in front of blurry background](http://webcf.waybackmachine.org/web/20210812044555im_/https://c.tadst.com/gfx/150x84/girl-birthday-cake-candles.jpg?1)
Leap Day Birthdays
When do “leaplings” celebrate their birthdays and when can they legally buy alcohol or get a driver's licence?
![Illustration image](http://webcf.waybackmachine.org/web/20210812044555im_/https://c.tadst.com/gfx/150x84/god-of-war-mars.jpg?1)
Tuesday: Tiw’s and Mars' Day
Tuesday was originally named after the Roman god of war Mars, but the Norse people named it after their own god of war, Tyr.
![Illustration image](http://webcf.waybackmachine.org/web/20210812044555im_/https://c.tadst.com/gfx/150x84/5weekend-hoax2.png?1)
What Are Week Numbers?
Most of us have learned that a year has 52 weeks. So why do some calendars have a week numbered 53?
![Illustration image](http://webcf.waybackmachine.org/web/20210812044555im_/https://c.tadst.com/gfx/150x84/tropical-year-illustration.png?1)
A Year Is Never 365 Days
The definition of a tropical year is the time it takes the Earth to complete a full orbit around the Sun. It is approximately 365.242189 days long.
![Friday is named after Norse Goddess Frigg or Frigga. Norse Goddess Frigg riding in a chariot pulled by goats.](http://webcf.waybackmachine.org/web/20210812044555im_/https://c.tadst.com/gfx/150x84/norse-goddess-frigg.jpg?1)
Friday Is the Fifth Day
Friday is the fifth day of the week, and the last day of the working week in most western countries. It is named after Norse fertility goddess Frigg.
![Temple of Saturn, Rome, Italy. Ruins of Temple of Saturn in Rome, Italy.](http://webcf.waybackmachine.org/web/20210812044555im_/https://c.tadst.com/gfx/150x84/temple-saturn-rome.jpg?1)
Saturday: Saturn's day
Saturday is the day of the week, and it is usually considered the sixth day of the week. Saturday is named after the ancient Roman god Saturn.
![Month of May Month of May](http://webcf.waybackmachine.org/web/20210812044555im_/https://c.tadst.com/gfx/150x84/the-month-may.jpg?1)
The Month of May
May is the fifth month of the year, has 31 days, and is named after the Greek goddess Maia.
![A Jewish man praying with a tallis (prayer shawl).](http://webcf.waybackmachine.org/web/20210812044555im_/https://c.tadst.com/gfx/150x84/yom-kippur-canada.jpg?1)
The Jewish Leap Year
The Jewish leap year has 13 months and occurs 7 times in a 19-year cycle.
![Illustration image](http://webcf.waybackmachine.org/web/20210812044555im_/https://c.tadst.com/gfx/150x84/long-weekend.png?1)
When Is the Next Long Weekend?
A long weekend lasts at least three days because a Monday or a Friday is a (bank) holiday. A four-day bridge weekend is when a Thursday or Tuesday is a holiday and you also have the bridge day off to join it with the weekend.
![A spring robin pulling out a worm.](http://webcf.waybackmachine.org/web/20210812044555im_/https://c.tadst.com/gfx/150x84/worm-moon.jpg?1)
March: Worm Moon
The Full Moon in March is the Worm Moon. It is also called Lenten Moon, Crow Moon, Crust Moon, Chaste Moon, Sugar Moon, and Sap Moon.
![A Full Moon shines over a field of corn ready to be harvested. Dark blue night sky in the background.](http://webcf.waybackmachine.org/web/20210812044555im_/https://c.tadst.com/gfx/150x84/full-moon-in-corn-field.jpg?1)
September: Harvest or Corn Moon
The September Full Moon is usually the Harvest Moon, but this depends on the equinox. It is also called Full Corn Moon or Barley Moon.
![Moon rising over snowy mountains.](http://webcf.waybackmachine.org/web/20210812044555im_/https://c.tadst.com/gfx/150x84/snow-moon.jpg?1)
February: Snow Moon
The February Full Moon is named after the snow on the ground. Some Native American tribes named this the Hunger Moon, others called it the Storm Moon.
![Pink wild ground phlox are a native flower to North America.](http://webcf.waybackmachine.org/web/20210812044555im_/https://c.tadst.com/gfx/150x84/pink-wild-phlox.jpg?1)
April: Pink Moon
Pink Moon comes from Pink Wild Ground Phlox which bloom in spring. Other names for this Full Moon are Sprouting Grass Moon, Fish Moon, Hare Moon, Egg Moon, and Paschal Moon.
![Real Earth Planet in yellow sun. Remodeled from real Earth NASA photo](http://webcf.waybackmachine.org/web/20210812044555im_/https://c.tadst.com/gfx/150x84/time-universe-6.jpg?1)
Did the Mayan Calendar Predict The End?
The Mayan calendar ended one of its great cycles in December 2012, which has fueled countless predictions about the end of the world on December 21, 2012 at 11:11(UTC).
![Illustration image](http://webcf.waybackmachine.org/web/20210812044555im_/https://c.tadst.com/gfx/150x84/stonehenge-june-solstice.jpg?1)
June Solstice Traditions
In many Northern Hemisphere cultures, the June solstice is associated with holidays, feasts and celebrations.
![Paddleboarders below the strawberry moon at Barceloneta beach, Barcelona, Spain.](http://webcf.waybackmachine.org/web/20210812044555im_/https://c.tadst.com/gfx/150x84/strawberry-full-moon.jpg?1)
June: Strawberry Moon
The wild strawberries that start to ripen gave name to the Full Moon in June. Other names are Rose Moon, Hot Moon, and Mead Moon.
![Lupine wildflowers above Park City, Utah.](http://webcf.waybackmachine.org/web/20210812044555im_/https://c.tadst.com/gfx/150x84/lupone-wildflowers.jpg?1)
May: Flower Moon
The Full Moon in May is known as the Flower Moon. Other names include the Corn Planting Moon, and the Milk Moon, while some named it the Hare moon.
![Illustration image](http://webcf.waybackmachine.org/web/20210812044555im_/https://c.tadst.com/gfx/150x84/chinese-calendar.jpg?1)
Chinese Leap Month
Instead of adding one leap day on February 29 nearly every four years, the Chinese add a leap month every three years to keep their calendar in line with the Earth's rotation.
![White-tailed deer buck near a canola field.](http://webcf.waybackmachine.org/web/20210812044555im_/https://c.tadst.com/gfx/150x84/buck-moon.jpg?1)
July: Buck Moon
The Full Moon in July is the Buck Moon. Is is also called Thunder Moon, Hay Moon, and Wort Moon.
![Illustration image](http://webcf.waybackmachine.org/web/20210812044555im_/https://c.tadst.com/gfx/150x84/coptic-church.jpg?1)
The Coptic Calendar
The Coptic calendar is linked to the ancient Egyptian calendar and the Julian calendar. It is used in Egypt and in the Coptic Church. How does it work?
![Illustration image](http://webcf.waybackmachine.org/web/20210812044555im_/https://c.tadst.com/gfx/150x84/hindu-prayer.jpg?1)
Leap Months and Leap Days in the Hindu Calendar
The Hindu calendar frequently adds or omits months or days to keep its lunar and solar time reckoning in sync. The concept differs from the western leap year.
![Mecca](http://webcf.waybackmachine.org/web/20210812044555im_/https://c.tadst.com/gfx/150x84/prophets-day.jpg?1)
The Islamic Leap Year
A leap year in the tabular version of the Islamic Hijri calendar occurs 11 times in a 30-year cycle when one day is added to the last month of the year.
![Lalibela, Ethiopia. January 18, 2014. The Church of St. George is carved out of stone and attracts visitors during the Timkat festival. The Church of St. George in Lalibela, Ethiopia.](http://webcf.waybackmachine.org/web/20210812044555im_/https://c.tadst.com/gfx/150x84/church-orthodox-lalibela-ethiopea.jpg?1)
The Ethiopian Leap Year
A leap year occurs every 4 years in the Ethiopian calendar when one extra day is added at the end of the year.
![Illustration image](http://webcf.waybackmachine.org/web/20210812044555im_/https://c.tadst.com/gfx/150x84/chinese-calendar-zodiac-symbols.jpg?1)
Leap Year in Different Calendars
Most western countries use the Gregorian calendar, but some use other calendars. Some calendars even add a leap month instead of a leap day.
![Iran flag waving in the wind above skyline of Tehran lit by orange glow of sunset. Iran flag waving in the wind above the skyline of Tehran lit by the orange glow of sunset.](http://webcf.waybackmachine.org/web/20210812044555im_/https://c.tadst.com/gfx/150x84/iran-flag-in-the-wind.jpg?1)
The Persian Leap Year
The Iranian or Persian calendar is one of the most accurate calendar systems ever devised. Find out what makes it so precise.
![Illustration image](http://webcf.waybackmachine.org/web/20210812044555im_/https://c.tadst.com/gfx/150x84/shwedagon-pagoda-myanmar.jpg?1)
The Buddhist Leap Year
Following the metonic cycle, the Buddhist calendar defines some years as leap years with 13 months. Great leap years have another extra day.
![Lotus Temple, in New Delhi, India. Lotus Temple, Bahai house of worship in New Delhi, India.](http://webcf.waybackmachine.org/web/20210812044555im_/https://c.tadst.com/gfx/150x84/lotus-temple-bahai.jpg?1)
Leap Year in the Bahá'í Calendar
The Bahá'í leap year occurs when five extra days are added between the last two months of the calendar. Leap years usually occur every four years.
![People watching fireworks above a mountain village.](http://webcf.waybackmachine.org/web/20210812044555im_/https://c.tadst.com/gfx/150x84/new-year-saas-fee.jpg?1)
When Do Decades Start?
Did the year 2020 mark the beginning of a new decade, or did the twenties begin on January 1, 2021?