Pyanopsia

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February 29, leap day, leap year, happens every four years

Leap Day, February 29

Candles Burning On Table In Church

What Is the Most Widely Practiced Religion in the World?

Calendar marking march 15th

22 Questions About Time and Timekeeping Answered

Ancient Mayan Calendar

Our Days Are Numbered: 7 Crazy Facts About Calendars

African American man praying in church with stained glass in background

Why Do People Say “Amen” at the End of a Prayer?

Discover

Amendments 1-10 to the Constitution of the United States constitute what is known as the Bill of Rights on an American flag.

What Is the Emoluments Clause?

Berries and leaves of the bittersweet nightshade (Solanum dulcamara) plant. Poisonous plant

7 of the World’s Deadliest Plants

Gutzon Borglum. Presidents. Sculpture. National park. George Washington. Thomas Jefferson. Theodore Roosevelt. Abraham Lincoln. Mount Rushmore National Memorial, South Dakota.

9 Memorials and Monuments in the United States

Close up of books. Stack of books, pile of books, literature, reading. Homepage 2010, arts and entertainment, history and society

12 Novels Considered the “Greatest Book Ever Written”

Figure 13: A Maxim machine gun, belt-fed and water-cooled, operated by German infantrymen, World War I.

7 Deadliest Weapons in History

US Marines firing at Fallujah, Iraq, during the Second Battle of Fallujah in November 2004. Operation Iraqi Freedom, Iraq War.

Timeline of the 2000s

Dancers at a Cinco de Mayo festival at the Mission District, San Francisco, California. (Photo dated 2019.) holidays

Is Cinco de Mayo Mexico's Independence Day?

Pyanopsia: Related Content

Written and fact-checked by The Information Architects of Encyclopaedia Britannica

Topics

ancient Olympic Games Thesmophoria Skirophoria Thargelia Anthesteria Bacchanalia Carneia Panathenaea Daphnephoria Daedala