I'm not positive on this one, but I think it was the Mayan Calendar, which is a circle with a face in the center. The year was 3372 B.C.
The mayans created it 2000 years before any type of Christianity was created,
They also understood aerodynamics "MAD"
(Hardskiaroonas)
Obid created the 365 calendar
The incans
The calendar was technically first invented by the Ancient Egyptians.
The Julian calendar took effect for the first time in 45 B.C.
The Julian Calendar was created by Julius Caesar. It was introduced in 46 BC. The calendar began to be used on January 1, 45 BC, and was used until replaced with the Gregorian Calendar in 1582.
The Jewish calendar came first. It was created in 3760 B.C. while the Mayan calendar was created in 3372 B.C.
napolean
The Mayans
shang
the mayans created the first calendar
Obid created the 365 calendar
The Newgate Calendar was created in 1774.
Positivist calendar was created in 1849.
Kingfisher Calendar was created in 2003.
Country Calendar was created in 1966.
Lemarean Calendar was created in 2002.
Calendar Man was created in 1958.