calendar: Media
chronology
Videos
An extra day is added to the calendar about every four years. Why?
Video: Encyclopædia Britannica, Inc.
Images
First complete printed title page for the Kalendarium (“Calendar”) by Regiomontanus,...
Rosenwald Rare Book Collection, Library of Congress, Washington, D.C.
Visual comparison of date formats: Day-Month-Year, Year-Month-Day (ISO 8601 standard),...
Encyclopædia Britannica, Inc.
Illustration from the calendar section of Les Très Riches Heures du duc de Berry,...
© Photos.com/Getty Images
Ariel view of Stonehenge, located in Wiltshire, England.
© Gavin Hellier/robertharding—Collection Mix: Subjects/Getty Images
The months and holidays of the Jewish religious year.
Encyclopædia Britannica, Inc.
The animals of the Chinese zodiac are depicted in a Chinese calendar from the 18th...
Photos.com/Getty Images
The Chinese yinyang li calendar, which shows the traditional Chinese zodiac...
© Liquidlibrary/Jupiterimages/Getty Images
Aztec calendar stone; in the National Museum of Anthropology, Mexico City. The calendar,...
Courtesy of the Museo Nacional de Antropología, Mexico City; photograph, Mexican Ministry of Tourism
Bookkeeper (right) rendering accounts to the Inca ruler Topa Inca Yupanqui. The contents...
Courtesy, Library Services Department, American Museum of Natural History, New York City (Neg. No. 321546)
Kiowa calendar painting of the years 1833–92 on buffalo hide, photograph by James...
"Seventeenth Annual Report of the Bureau of American Ethnology to the Smithsonian Institution, 1895-96," by James Mooney.
A perpetual calendar makes it possible to find the correct day of the week for any...
© Dan Tataru/Shutterstock.com
Detail of a Hindu calendar for 1871–72, from Rajasthan, India, 1871; in the Asian...
Asian Reading Room—World Treasures of the Library of Congress Exhibition/Library of Congress, Washington, D.C.
Interactives
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