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Fibonacci year 1220- Learning decimal Indian numbers in Algeria or Tunisia? Meeting Roman Emperor Frederick in Pisa, ...
Meeting Roman Emperor 1235 AD Learning from Arab Teacher Two clocks with different dials of number systems. Imaginary - A Tower clock in Italian building getting changed to decimal Pulling down Roman numerals - Fibo proudly displaying Fibo displays a calendar with decimal Inian system - Imaginary The Best - On a big White wall Fibo writes X . (Roman number for 10) Then writes 10 the Indian number . Then scores off the X (Good bye to Roman numeral)
EGYPT 300 BC
The ancient priests of Egypt, during the rule of the Pharoah kings, knew astronomy and could predict when Nile river would flood and when the farmers can start sowing the seeds. In 300 BC or so, the priests discovered their calculations had a minor error. They could not predict the flooding accurately. Why? Their calendar was based on moon's appearances and movement. Their calendar had 365 days. What was the solution? They added a quarter day to the year and error was corrected.

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