Yes, a calendar is an invention. Throughout history people had realised that there was a pattern to the days and seasons that we call a year. So they invented ways of recording these. So we now have calendars of many kinds.
invention of a sophisticated calendar
Calendars are a human invention, no calendar has been applied to Mars yet.
Calendar
Popcorn, calendar wheels (which lead to the invention of clocks), chocolate and chewing gum. They also invented astrology.
The invention that the Babylonians were known for was the accurate calendar, astronomy, and mathematics.
Invention with Brian Forbes - 2009 Space Age Digital Calendar and Planner 1-5 was released on: USA: 6 June 2009
The invention of the solar calendar is attributed to the ancient Egyptians, who developed a calendar based on the movement of the sun. This solar calendar helped them track the seasons for agricultural and religious purposes.
The Greek scientist who is often credited with the invention of the Greek calendar is Meton of Athens. In 432 BCE, he introduced the Metonic cycle, a 19-year cycle that aligns the lunar months with the solar year, making it easier to track agricultural and religious events. This calendar system significantly influenced later calendars, including the Jewish calendar.
The first known calendar is believed to have been created by the ancient Sumerians around 4000 BCE. It was a lunar calendar based on the phases of the moon. This system later influenced the development of other calendars used by various civilizations.
The Mayan calendar or maybe their structures that looked like pyramids while being almost perfectly lined up when it would be very hard to do this in their time.
the Gregorian calendar
No, the 2012 calendar has its dates on the same days of the week at the 1984 calendar and the 2040 calendar. The 2000 calendar is likewise the same as the 1972 calendar and the 2028 calendar.