Umar Khyam in 11th Century as per Daily Jang news paper of Pakistan's ad "Zara Soochiye".
Maya
The civil version of the Julian calendar is based on the su, and so it is solar. However, the Julian calendar includes an undated lunar calendar that allows it to calculate when Easter is, so it is lunisolar.
Julius Caesar replaced the lunar Roman calendar with the solar Julian calendar in 46 BCE. It took effect beginning in 45 BCE.
The Egyptians
they are diffrent
1914
All cultures have invented some form of calendar. Most are based on the solar year or the lunar month.
No, Jesus did not invent the calendar. The modern calendar system in use today (the Gregorian calendar) was created centuries after Jesus' time, in the 16th century. It is based on the solar calendar introduced by Julius Caesar in 45 BCE.
The United States uses the Gregorian calendar, which is a solar calendar.
Lunar calendar
solar
A solar calendar is a type of calendar that is based on the position of the Earth in relation to the sun. This means that the calendar is organized around the length of the solar year, which is the time it takes for the Earth to complete one orbit around the sun. Solar calendars are used to keep track of the seasons and to organize events and appointments throughout the year. Some examples of solar calendars include the Gregorian Calendar, the Julian Calendar, and the Hindu Calendar. The solar calendar is the most widely used calendar system in the world and is the standard for civil and commercial purposes.
George Washington invented the lunar calendar
YES.the incas had a solar and lunar calendar
The Gregorian Calendar is solar and the Hebrew Calendar is lunisolar.
A purely solar calendar, such as the Gregorian calendar that is commonly used, has no connection to the cycles of the Moon, and is tied strictly to the solar year. Months are pretty much arbitrary. In a lunar calendar, the month always begins at the new moon, and dates always occur on the same phase of the Moon. A purely lunar calendar (such as the Islamic calendar) does not synchronize with the solar year at all. A luni-solar calendar such as the Hebrew calendar is primarily tied to the Moon, but also adds "leap months" periodically to maintain a rough match with the solar year.
The name of the person that invented the first calendar is not known. The first calendar was invented in Scotland.