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. more
Articles About Calendar (87)
The Seven-Day 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. more
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. more
The Full Moon
The Full Moon is the moment the entire face of the Moon is illuminated by the Sun's rays. It is the 3rd primary phase. Each Full Moon has a name, except the Blue Moon. more
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. more
The Gregorian Calendar
The Gregorian calendar is the internationally accepted civil calendar that was first adopted in 1582. more
The New Moon
In modern astronomy, the New Moon is when the Sun and Moon are aligned, with the Sun and Earth on opposite sides of the Moon. The New Moon also has important cultural and religious significance worldwide. more
The Mayan Calendar
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. more
The Chinese Calendar
The Chinese calendar is one of the oldest calendars in modern society. It is a lunisolar calendar. more
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. more
What Do CE and BCE Mean?
CE is an abbreviation for Common Era and BCE is short for Before Common Era. more
What Is a Blue Moon?
'Once in a blue moon', suggests something is very rare. But just how rare is a Blue Moon? more
June Solstice
The June solstice is the longest day of the year in the Northern Hemisphere & the shortest day in the Southern Hemisphere. more
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. more
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. more
First Quarter Moon
The First Quarter Moon is a primary Moon phase when we can see exactly half of the Moon's surface illuminated. If it is the left or right half, depends on where you are on Earth. more
Leap Day on February 29!
2020 is the next leap year when you get an extra day on February 29. more
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? more
From Julian to Gregorian Calendar
The Gregorian calendar was first introduced in 1582, however, different countries changed from the Julian Calendar at different times. more
The Roman Calendar
The Roman calendar is is the grandfather of our modern calendar. more
Third Quarter Moon
The Third or Last Quarter Moon is when the opposite half of the Moon is illuminated compared to the First Quarter. more
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. more
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. more
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. more
Palindrome Day
A Palindrome Day happens when the day’s date can be read the same way backward and forwards. The dates are similar to word palindromes in that they are reversible. Depending on the date format Palindrome Days can be rare. more
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. more
Why Are There 7 Days in a Week?
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. more
Jewish Calendar – Hebrew 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. more
Is There a Perfect Calendar?
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? more
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. more
Did the Millennium Start in Year 2000 or 2001?
When did the 3rd millennium and 21st century begin: on New Year's Day 2000 or 2001? Did the anno domini time reckoning start with year 1 or year zero AD? more
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. more
What is a Common Year?
A common year is a calendar year with 365 days and only 28 days in February. more
The Month of January
January is the first month of the year, has 31 days, and is named after the two-faced Roman god Janus. more
Waning Crescent Moon
During the Waning Crescent Moon phase, the illuminated part of the Moon decreases from a semicircle at Third Quarter until it disappears from view entirely at New Moon. more
February 30
February 30 actually existed at least twice in the past, according to historical records. more
The Doomsday Algorithm
Some dates fall on the same weekday every year. Use this knowledge to calculate the weekday of any date in your head. more
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. more
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. more
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. more
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. more
Leap Day Customs
Learn more about Leap Day traditions, superstitions and folklore. more
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. more
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. more
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. more
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. more
Special Calendar Dates
Learn more about numerically unique calendar dates such as sequential dates, same number dates, and palindrome (reversible) dates more
The Month of August
August is the eighth month of the year in the Gregorian calendar and is named after Augustus Caesar. more
The Month of March
March is the third month of the year, has 31 days, and is named after Mars, the Roman god of war. more
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. more
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? more
December: Cold Moon
The December Full Moon is called the Cold Moon, Long Nights Moon, the Moon before Yule, Oak Moon, and Wolf Moon. more
Anniversary and Birthday Traditions
Anniversaries and birthdays are celebrated differnetly in different cultures around the world. more
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. more
The Month of June
June is the sixth month of the year, has 30 days, and is named after the Roman goddess Juno. more
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? more
The Month of July
July is the seventh month of the year, has 31 days, and is named after Julius Caesar. more
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. more
The Month of April
April is the fourth month of the year in the Gregorian calendar and is named after the Greek goddess Aphrodite. more
Leap Day Birthdays
When do “leaplings” celebrate their birthdays – every year or only during leap years? more
Tuesday – Second day of the week
Tuesday was originally named after the Roman god of war Mars, but the Norse people named it after their own god of war, Tyr. more
How Do Week Numbers Work?
Most of us have learned that a year has 52 weeks. So why do some calendars have a week numbered 53? more
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. more
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. more
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. more
The Month of May
May is the fifth month of the year, has 31 days, and is named after the Greek goddess Maia. more
The Jewish or Hebrew Leap Year
The Jewish leap year has 13 months and occurs 7 times in a 19-year cycle. more
Long Weekend – Bank Holiday 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. more
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. more
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. more
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. more
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. more
End of the world December 21, 2012?
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). more
June Solstice Traditions
In many Northern Hemisphere cultures, the June solstice is associated with holidays, feasts and celebrations. more
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. more
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. more
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. more
July: Buck Moon
The Full Moon in July is the Buck Moon. Is is also called Thunder Moon, Hay Moon, and Wort Moon. more
Coptic Calendar – Alexandrian 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? more
Adhik Maas – the Hindu Leap Month
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. more
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. more
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. more
Leap Year in Other 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. more
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. more
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. more
Bahá'í Leap Year
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. more
Friday the 13th
Friday the 13th, also known as Friday 13 or Friday the thirteenth, has been considered as a day of bad luck in various countries for many years. more
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