Babylonians and Egyptians.
The Egyptians
Hebrews
Properly speaking, there is no "English" calendar system. You probably mean the predominant Western Calendar (also called the Christian Calendar). This calendar system is best called the "Gregorian Calendar", after Pope Gregory XIII who introduced the calendar system in 1582.
It was King Richard I of England.
The best known work of Alexis de Tocqueville is titled "Democracy in America," which is a work written about political and social issues of the US in the 1800's.
eyptians
eyptians
desert farming
The Egyptians
Omar Khayyam, a Persian mathematician, astronomer, and poet, is best known for his work on algebra and his poetry collection "Rubaiyat." He made significant contributions to the development of the calendar, as well as studies of algebraic equations.
which culture is best known for embalming tecniqes
Calendar is the best time keeping tool.
Charles Darwin
Hebrews
babylonians
The Phoenicians are best known for the development of the alphabet, which later influenced various writing systems, including Greek and Latin scripts. Their alphabet was a significant advancement in communication and literacy.
Callippus is often known by his full name, Callippus of Athens. He was an ancient Greek astronomer, mathematician, and philosopher, notable for his work on the calendar and for refining the earlier work of Hipparchus. Callippus is best known for the Callippic Cycle, which improved the accuracy of the lunar calendar.