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1. en.wikipedia.org › wiki › Wikipedia:On_this_dayWikipedia:On this day/Today - Wikipedia

   en.wikipedia.org › wiki › Wikipedia:On_this_day

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   On this day/Today. 1884 – Outraged by a jury's decision to convict a man of manslaughter instead of murder, a mob in Cincinnati, Ohio, began three days of rioting. 1899 – Philippine–American War: American forces defeated troops commanded by Philippine president Emilio Aguinaldo at the Battle of Marilao River.

   • History of calendars - Wikipedia

     The history of calendars covers practices with ancient roots...

   • April 21 - Wikipedia

     April 21 is the 111th day of the year (112th in leap years)...

2. www.britannica.com › on-this-dayOn This Day - What Happened Today In History | Britannica

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   On This Day In History: anniversaries, birthdays, major events, and time capsules. This day's facts in the arts, politics, and sciences.

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3. People also ask

   What is the history of calendars?

   • The history of calendars covers practices with ancient roots as people created and used various methods to keep track of days and larger divisions of time. Calendars commonly serve both cultural and practical purposes and are often connected to astronomy and agriculture .

   History of calendars - Wikipedia

   en.wikipedia.org/wiki/History_of_calendars

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   How did ancient calendars work?

   • Calendars in antiquity were usually lunisolar, depending on the introduction of intercalary months to align the solar and the lunar years. This was mostly based on observation, but there may have been early attempts to model the pattern of intercalation algorithmically, as evidenced in the fragmentary 2nd-century Coligny calendar.

   History of calendars - Wikipedia

   en.wikipedia.org/wiki/History_of_calendars

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   How old is a calendar?

   • Calendars are explicit schemes used for timekeeping. The first historically attested and formulized calendars date to the Bronze Age, dependent on the development of writing in the ancient Near East. In 2000 AD, Victoria, Australia, a Wurdi Youang stone arrangement could date back more than 11,000 years.

   History of calendars - Wikipedia

   en.wikipedia.org/wiki/History_of_calendars

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   When did the Julian calendar start?

   • The resultant Julian calendar remained in almost universal use in Europe until 1582, and in some countries until as late as the twentieth century. Marcus Terentius Varro introduced the Ab urbe condita epoch, assuming a foundation of Rome in 753 BC.

   History of calendars - Wikipedia

   en.wikipedia.org/wiki/History_of_calendars

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4. www.onthisday.com › calendarCalendar of Days in History - On This Day

   www.onthisday.com › calendar

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   Find out what happened on any day in any month in history via our on this day in history calendar. Includes important events, famous birthdays and deaths.

5. www.onthisday.com › history › eventsToday's Events in History - On This Day

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   Historic, important and momentous events that happened on this day in history. Events include discoveries, inventions, battles and many firsts in history.

6. www.onthisday.com › today › eventsToday's Historical Events - On This Day

   www.onthisday.com › today › events

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   3 days ago · Search the largest and most accurate independent site for today in history. Learn which important and interesting historical events happened on today in history. Hundreds of events, facts and photos from history, film, music and sport.

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