Mathematics: The most important mathematical achievement during the Gupta Era was the invention of the decimal system with zero as a placeholder. The Indian numerals, the first positional base 10 numeral system in the world and it was spreaded to places like China and the Middle East.
development in the field of astronomy also was important, they’re length of days and years were calculated accurately.
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To celebrate Thanksgiving? Research on it maybe, im sorry i couldnt help :(
