There is a monument called the"Georgia Guidestones" that contain instructions on how to rebuild the world after an apocalypse in 8 different languages. It also serves as a sundial, calendar and a compass. atlasobscura.com/places/g…
There are 35 possible dates that Easter can land on, some of which don't repeat for hundreds of years at a time. Nearly 1 out of every 10 calendar dates has been or will be Easter. en.wikipedia.org/wiki/Lis…
Ethiopia uses a 13-month calendar and is between 7 and 8 years behind the Gregorian calendar used in the rest of world. New Years is either on August 29 or August 30. en.wikipedia.org/wiki/Eth…
The Ethiopia uses the Coptic Calendar which is seven to eight years behind the Gregorian Calendar, meaning it is currently 2012. face2faceafrica.com/artic…
In 1750 the Julian Calendar was replaced by the Gregorian Calendar, changing the formula for calculating leap years. The beginning of the legal new year was moved from March 25 to January 1. Finally, 11 days were dropped from the month of September 1752. en.wikipedia.org/wiki/Cal…
NASA's three spacecraft losses occurred within a calendar week of one another: Apollo 1 on 1/27, Challenger on 1/28, and Columbia on 2/1 space.com/4879-nasa-remem…
Leap days were actually put into use since 46 BC by Julius Caesar after him personally consulting Greek astronomer Sosigenes of Alexandria for the fact that one year was slightly longer than 365 days and if they continued with the existing calendar, July would eventually fall on winter. apod.nasa.gov/apod/ap2002…
Today I learned about the International Fixed Calendar. It is comprised of 13 months of 28 days each (364) + 1 extra day that doesn't belong to any week. it is a perennial calendar and every date falls on the same day every year. It was never adopted by any country but the Kodak company used it from 1928-1989. citylab.com/life/2014/12/…
The first digital Casio watch was called the 'Casiotron' and was released in November 1974. It was the first ever digital watch to include a calendar function. Still available secondhand. digitalwatchcentral.com/t…
North Korea uses a different calendar than the rest of the world, with year 1 indicating the birth of Kim Il-Sung en.wikipedia.org/wiki/Nor…
The annual Exxon safety calendar featured the Exxon Valdez for the month of March in 1989. On March 24th, 1989, the Valdez ran aground - the most devastating environmental oil spill in history. response.restoration.noaa…
Greece, Bulgaria, Romania and Cyprus have adopted the Revised Julian calendar, which currently aligns its dates with the Gregorian calendar but will start differing from February 2800 en.wikipedia.org/wiki/Rev…
When William III invaded England in 1688, he departed the Netherlands on November 11 and landed in England 4 days later on November 5. At the time England used a calendar that was 11 days behind most of Europe. en.wikipedia.org/wiki/Old…
2020 is Geng Zi year in the Chinese calendar, a time that historically has been bringing about major catastrophes and monumental changes thearticle.com/year-of-th…
The Ethiopian calendar is 7-8 years behind the Gregorian calendar, meaning that the current year in that calendar is 2012. It has a thirteenth month, consisting of five days, or six in leap years. Also, the first day of the year is on September 11, or on September 12 in leap years. en.wikipedia.org/wiki/Eth…
Russia removed Saturday and Sunday from the calendar for 11 years to create a "continuous working week" from 1929 to 1940. history.com/news/soviet-u…
The phrase β€œOnce In A Blue Moon” derives from the lunar event when there are two full moons in the same calendar month...an event that occurs once every two to three years. The next occurrence is in October 2020. en.wikipedia.org/wiki/Blu…
In 1752, 11 days of the month of September in North America were skipped in order to transition to the Gregorian calendar from the Julian calendar because the Julian calendar didn't calculate leap years well. en.wikipedia.org/wiki/175…
Woody Allen's film "A Rainy Day in New York" ran into issues that delayed it's released from 2018 to 2019. 2018 was the first time an entire calendar year had gone by without a new Woody Allen film since 1981. en.wikipedia.org/wiki/Woo…
There's a mock religion called Discordianism. Its main deity is Eris (goddess of discord, of course) and it even has a calendar. A Discordian believes there is no distinction between disorder and chaos. en.wikipedia.org/wiki/Dis…
There is no year zero in the Gregorian Calendar, meaning that it went from 1 BC to 1 AD. en.wikipedia.org/wiki/AD_…
In 1752, the United States did not have a September 3rd-13th as they transitioned from the Julian Calendar to the Gregorian Calendar en.wikipedia.org/wiki/Lis…
There are only 14 possible ways to arrange a calendar, meaning that you can reuse calendars from previous years. lifehacker.com/you-can-re…
Year AD 2020 is year 4718 in the Chinese Calendar, year 1441 AH in Islamic Calendar, and 12020 HE in the Holocene calendar. blog.studocu.com/en/uncat…
North Korea calendar is Juche 109 instead of 2020 wafflesatnoon.com/north-k…
There is a monument in Georgia which gives instructions in 8 languages on how to rebuild society after an unknown apocalyptic event, whilst also functioning as a compass, calendar and clock zmescience.com/other/feat…
During WWII, Girl Scouts couldn't sell cookies because many of the ingredients needed were being rationed to the military. In light of this some of them sold Girl Scout calendars, or collected and sold scrap metal. mentalfloss.com/article/9…
In 45 BC the New Year was moved from March 1 to January 1. But it was abolished making December 25 as the beginning of the New Year. Then it was changed to March 25. Between 1582 and 1752 there where two calendars. Gregorian then replaced the Julian Calendar and Jan 1 became the legal New Year. libguides.ctstatelibrary.…
In 1783, a mysterious admirer of Marie Antoinette ordered her a most complicated pocket watch from Breguet. It included hours, minutes, seconds, perpetual calendar, equation of time, repetition for hours, quarters and minutes, independent seconds, thermometer and power-reserve indicator. breguet.com/en/house-breg…
"AD" in the calendar stands for "Anno Domini" and not "After Death". Anno Domini stands for "In the year of our/the Lord" simple.wikipedia.org/wiki…
A calendar system for Mars has already bean devised for potential future settlement. The calendar contains 24 months of 27 or 28 days each, named after Latin and Sanskrit constellation names. en.wikipedia.org/wiki/Dar…
The Ancient Romans Used to Celebrate the New Year in March instead of January and were on a calendar that followed the lunar cycle instead of the sun mic.com/articles/163481/h…
Saint Thomas Γ  Becket, Petrarch, Erasmus of Rotterdam, Albrecht DΓΌrer, Nicolaus Copernicus, Pope Gregory XIII (reformer of the calendar), Enzo Ferrari, Michaelangelo Antonioni, and Umberto Eco all studied at the same university en.wikipedia.org/wiki/Uni…
The French Revolution Republican calendar used by the French government from 1793 to 1805 divided the year into 12 months of 30 days, with 3 weeks in each month with 10 days in each week. Each day had 10 hours with 100 minutes and each minute with 100 seconds en.wikipedia.org/wiki/Fre…
Why February has shorter days because it was originally the last month of the year. (Before there were only 10 months, Mar to Dec. Jan & Feb were added) The number of days of previous months were already determined, and February got the shorter number of days to maintain 365-day calendar year. cbc.ca/kidscbc2/the-feed/…
Ethiopian calendar is 7 years and three months behind the Gregorian calendar. So while we are waiting for this new decade, they're still in 2012. en.wikipedia.org/wiki/Eth…
Due to the shortness of the Roman calendar year, the intercalary month Mercedonius was inserted into February, partly to prevent February having an even number of days en.wikipedia.org/wiki/Rom…
Prince Philip was born in a time and place where the Julian calendar was still in use, rather than the Gregorian calendar, giving him two "different" birthdays en.wikipedia.org/wiki/Pri…
Around 2000 BC, calendars had only 10 months, designated 1st March as 1st day of the year. Also, British Empire and it's American colonies celebrated New Year on 25 March until the year 1752. en.wikipedia.org/wiki/New…
When the United States bought Alaska from Russia, due to a combination of the International Date Line moving and switching to the Gregorian calendar, the days from October 8th through 17th in 1867 never occurred in Alaska. en.wikipedia.org/wiki/Int…
In an effort to replace the Catholic calendar of saints, each day of the metric French Republican Calendar was named after a unique plant, animal, or mineral. en.wikipedia.org/wiki/Fre…
Anno Domini was invented by Dionysius (born 470 AD) to prevent people from believing the End of the World. Based on the Anno Mundi (year after creation) calendar, Jesus was born in the year 5500, and 500 years (or AM 6000 or 500 AD) was thought to be the second coming of Christ. en.wikipedia.org/wiki/Dio…
The year 1752 was shortened by 11 days because England changed their calendar to the one in use today. history.co.uk/article/the…
"Blocks found with dates from all seasons in the Egyptian calendar suggest the pyramids were built year-round and not just when the Nile was in flood." nationalgeographic.com/ar…
Ethopia has its own calendar system en.wikipedia.org/wiki/Eth…
The Romans had a 13th "leap month" known as Mercedonius which functioned similarly to the modern leap day. It was eliminated when Julius Caesar replaced the Roman Calendar with the Julian calendar. en.wikipedia.org/wiki/Mer…
Author Douglas Adams once got an offering of Β£50,000 to write a Hitchhiker's Guide to the Galaxy calendar. A few weeks later, having done no work towards it, another call came saying the deal had fallen through but that he would still be paid half the fee. He celebrated with champagne. en.wikipedia.org/wiki/Hun…
Pastafarians in Australia have a different 'holy' day for every day of the year in the Pastafarian Calendar of β€˜Special’ Days pastafarians.org.au/pasta…
It's called October because it was originally the eighth month in the old Roman calendar. "Octo" is from the Ancient Greek and Latin words meaning "eight." en.wikipedia.org/wiki/Oct…
The calendar year did not always start on Jan 1. This leads to the format of dual dating for things like birthdays to remove the ambiguity. en.wikipedia.org/wiki/Old…
To determine freshness of eggs, a Julian date or pack-date calendar is printed on the carton. This three-digit code indicates the date of packaging, starting with January 1 as 001 and ending with December 31 as 365. food.unl.edu/cracking-dat…
The Founder of Kodak, George Eastman, insisted the company use a 13 month, 28 day per month calendar. This system would be used by Kodak as the official date system from 1928 to 1989. gizmodo.com/5917654/kodak…
September, October, November and December were named as such because they were the 7th, 8th, 9th and 10th months of the Roman calendar respectively. webexhibits.org/calendars…
Ethiopia is several years behind the rest of the world. Since the religious country is so strongly influenced by the Coptic Orthodox Church, it still adheres to the traditional calendar of that church, which is seven years behind the rest of the world. Currently it's November 2011 there. en.wikipedia.org/wiki/Eth…
In the UK White Christmases were more frequent in the 18th and 19th centuries, even more so before the change of calendar in 1752 which effectively brought Christmas Day back by 12 days. metoffice.gov.uk/weather/…
French Republican calendar sought to modernize the measure of time with 10 days per week, 10 hours per day, 100 minutes per hour, and 100 seconds per minute. en.wikipedia.org/wiki/Fre…
Traditional Japanese calendars have 24 15-day seasons split into 72 five-day microseasons. Right now is "Farmers drain fields," followed by "Wild geese return" and "Chrysanthemums bloom." nippon.com/en/features/h0…
Mayan calendars were more accurate than the calendars of the invading Spanish. This is because the Mayans didn't make the mistake that the Greeks did in thinking of the heavens as a groups of spheres moving in circles, but instead based their system on hundreds of years of observations. youtube.com/watch?v=eZoe6…
The Russians showed up 12 days late to the 1908 Olympics in London because they were using the Julian calendar instead of the Gregorian calendar. si.com/extra-mustard/2013…
The Ancient Egyptian Civic Calendar has 12 months with an equal 30 days each, and an extra 5 days of festivities celebrating different gods. Totalling 365 days a year. en.wikipedia.org/wiki/Egy…
The Roman calendar had 10 months but after calendar reform, renaming existing months and adding more months to make it closer to a solar year, they failed to rename the last 4 months which is why they are still named according to the archaic numeral: Sept 7, Oct 8, Nov 9 and Dec 10. en.wikipedia.org/wiki/Jul…
The $267m Deep Impact Comet Mission which travelled 429 million km ended due to a Y2K-like software bug that didn't roll over the calendar date correctly and misread any date after August 11, 2013 - leading to endless reboots. nationalgeographic.com/ne…
Ethiopia operates on the Eritrean calendar, which usually is 7-8 years behind the Gregorian calendar used by most of the world. It's currently 2012 there. wikipedia.org/wiki/Ethiop…
The official 1752 calendar in Britain ticked off 11 days from September when adopting the Gregorian calendar so the day after 2nd September was officially considered 14th September. mentalfloss.com/article/5…
Today I learned of nepreryvka, the Soviet calendar introduced in 1918 which had a 5-day week (no weekends), days were labeled by color and Roman numeral, and had 20% of the population "off work" on a given day en.wikipedia.org/wiki/Sov…
In 1908 the Russian Olympic team arrived at the Olympics in London 12 days late because it was still using the Julian calendar instead of the Gregorian calendar si.com/extra-mustard/2013…
Cervantes and Shakespeare died on the same date, but not on the same day; due to England and Spain having different calendars at the time. latimes.com/books/la-ca-j…
George Washington was born on February 11th, but when his birthday first became a holiday it was celebrated on February 22nd. This is because when Washington was born, British colonies were still using the Julian calendar, which was 11 days behind the Gregorian. en.wikipedia.org/wiki/Was…
The fifth through the 14th of October in the year 1582 never existed. They were skipped over to adjust for the 10 days difference between calendar and reality that the previously-used Julian calendar had caused, and to transition to the modern Gregorian calendar. en.wikipedia.org/wiki/Gre…
The Moon’s orbit is spiraling away from Earth at a rate of nearly 1.5 inches (4 cm) per year. In response, Earth’s rotation rate is slowly slowing, necessitating a Leap Second to be added to the calendar, every now and then. en.wikipedia.org/wiki/Moo…
Today I learned that, in the 1920's, a new "fixed length" calendar with 13 months of 28 days each, was voted in by a League of Nations special committee. Although this calendar never gained widespread adoption, it remained the official calendar of the Kodak company un 1989. en.wikipedia.org/wiki/Int…
The October Revolution was actually in November as the Russians were still using the Julian Calendar. Following the revolution the Communists moved to the Gregorian calendar like Europe. newsweek.com/why-russias-…
Even though the Jewish calendar indicates this is the year 5779 it was only started in the year 200 CE by rabbis who estimated time began in the year 3761 BCE when Adam left the Garden of Eden latimes.com/archives/la-x…
August's original name in Latin was Sextilis because it was the sixth month in the original 10-month Roman calendar. At the time, the first month was March. en.wikipedia.org/wiki/Aug…
North Korea uses the Juche calendar, named after the Juche ideology, instead of the Gregorian Calendar. The Juche Calendar shows Year 1, or Juche 1, as 1912, the birth year of Kim Il-sung. youngpioneertours.com/und…
Today I learned about Tisha B'Av. The day is considered the saddest day in the Jewish calendar with 14 national calamities historically happening to the Jewish people around that date. en.wikipedia.org/wiki/Tis…
When the USS West Virgina was finally raised after being sunk during the bombing of Pearl Harbor, deceased men were found in an airtight storeroom. On the calendar, 16 days were crossed off in red pencil. community.seattletimes.nw…
The year 46 BCE is the longest year with 440 days due to the Romans converting from the old Roman calendar (which was 3 months out of date) to the currently used Julian calendar. youtu.be/fD-R35DSSZY
The Calendar Act of 1750 caused Great Britain and its colonies to skip the dates of September 3-13 in 1752, allowing them to catch up with the rest of Europe and the Gregorian calendar. mentalfloss.com/article/5…
We almost had a symmetrical 13 month calendar where every month had 28 days and the each day-number was always on the same day of the week (26th was always a Thursday). citylab.com/life/2014/12/…
The year 46 BCE had 445 days in an attempt to "recalibrate" the Roman calendar before the Roman Empire switched to the Julian Calendar. en.wikipedia.org/wiki/46_…
The Ethiopian calendar has 13 months and it is 7 or 8 years behind the Western calendar factretriever.com/ethiopi…
Today I learned about the Antikythera mechanism, an Analogue Computer from 100 BC used to predict astronomical positions for calendars decades in advance. en.wikipedia.org/wiki/Ant…
In the 1908 London Olympics, the Russian team arrived 12 days late and missed their most favoured event because they were still following the Julian calendar rather than the Gregorian calendar. sports-reference.com/olym…
Marilyn Monroe never intentionally posed for the first issue of Playboy. Hefner paid $500 to a Chicago calendar company for the photos which were taken 4 years earlier. Marilyn was paid $50 for the initial shoot and had to buy a copy of the magazine herself to see the photos. bbc.com/news/world-us-can…
Today I learned of a more efficient 13 month calendar that gained support during the 20th century but ultimately failed to be adopted. citylab.com/life/2014/12/…
In a customary exchange of gifts, Justice Kennedy gave the communist Chinese Vice Premier a Supreme Court facts calendar. He then had the interpreter read the fact listed on the VP's birthday: "April 17, Supreme Court decides US v. Dennis, affirming prison terms for five communist leaders." youtube.com/watch?v=U8rJE…
The Gregorian calendar is off by 26 seconds every year. By the year 4909 we'll be off by one day. graphics.latimes.com/leap…
The time difference between Pago Pago American Samoa and Kiritimati Kiribati is 25 hours which would mean for 2 hours everyday 3 different calendar dates are observed in different places en.wikipedia.org/wiki/Int…
The Roman calendar originally had 10 months - the last month of the year, December, literally means 10th month. The months of January and February were added as part of the reform of the calendar into the Julian calendar, and subsequently the Gregorian calendar as we now know it. en.wikipedia.org/wiki/Jul…
The year 46 BC had 445 days in it due to the change from the 10 month calendar to the 12 month calendar by Caesar. It became known as "The Year of Confusion." en.wikipedia.org/wiki/46_…
In most of the world, 11 days of October 1582 never happened. During the year 1582, Pope Gregory XIII introduced the calendar we use today, the Gregorian Calendar. He ruled that after the day of October 4, 1582, the next day would be October 15th. onthisday.com/events/date…
Today I learned of the Darian calendar, which is designed for use on Mars and has 24 months. The months are named after constellations in the Zodiac, in Latin and Sanskrit. en.wikipedia.org/wiki/Dar…
The early Roman calendar designated March 1 as the first day of the year. The calendar had just ten months, beginning with March. en.www.wikipedia.org/wiki…
A habit tracker is a calendar in which you write down a goal. Then, the idea is to color in each day that you accomplish that goal. For example, meditating or exercising. The logic behind it is that you feel motivated to keep doing the habit once you start seeing that the month has almost every uruit.com/blog/agile-conf…
April Fools Day is a tradition that dates all the way back to ~1582. People who were slow to swap the Julian calendar for the Gregorian were made to look like fools, with people putting fish on their backs to show they were gullible or 'easily hooked'. We've kept this up for nearly 5 centuries.. history.com/this-day-in-h…
Currently there's exactly 3 countries that haven't adopted the Gregorian calendar: Ethiopia, Iran and Afghanistan en.wikipedia.org/wiki/Ado…
The year 46 BC in the Roman calendar had 445 days uh.edu/engines/epi2364.ht…
While on a hunting trip, guitarist Jerry Cantrell of Alice In Chains forgot that November only had 30 days, missing a scheduled performance on December 1st. The next day, he received a calendar as a gift from Columbia records. layeroffrost.com/aic/bio_…
Three bodies were found in a storage room on the USS West Virginia when she was re-floated after Pearl Harbor. A calendar kept by the men indicated that they had survived for over two weeks after the attack. [Repost] en.wikipedia.org/wiki/USS…

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