Final answer:
Chinese New Year starts on the first new moon after the sun enters Aquarius and varies between 21st January and 19th February, based on the lunar calendar and sexagenary cycles.
Explanation:
Chinese New Year starts on the first new moon after the sun enters Aquarius, which can vary between 21st January and 19th February. The Chinese calendar is lunar-based and consists of twelve new moons per year, with months starting at the new moon. The calculation of years in China is done through sexagenary cycles, introduced in 2637 B.C. by emperor Hwang-te.
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