The modern calendar was created by Pope Gregory XIII in 1582. He introduced the calendar as an adaptation of the Julian version because the drift of Easter, which was tied to the spring equinox, was considered undesirable by the Roman Catholic Church.
Evidence indicates that the first calendar was created by the Stone Age people in Britain about 10,000 years ago. The earliest known calendar was a lunar calendar, which tracked the cycles of the moon.
The Advent calendar was first printed by Gerhard Lang in the early 1900s. The tradition of counting down the days of Advent began in Germany in the 19th century. Lang based his printed calendar on a version that his mother had made for him.
German engineer Konrad Zuse developed the first actual computer, the Z3, in 1941. Bell laboratories had introduced a calculating machine, the Complex Number Calculator, in 1940, one year prior to the Z3.
The first gasoline-powered wheeled vehicle was invented in 1885 by Karl Benz. However, many previous developers and designers had notions of automated conveyance, including Leonardo da Vinci.
Wristwatches were first officially invented in 1868 when a watch was created for the Countess of Hungary. Prior to the first official wristwatch, pocket watches were adapted to be worn on the wrist as early as 1570.
The most popular photograph calendars purchased in 2014 include pop band One Direction, pop stars Taylor Swift and Justin Bieber, rock band The Beatles and pop-culture icon Marilyn Monroe. One Direction also holds the title for highest-selling calendar of all-time, pass...