Heavenly Mathematics & Cultural Astronomy, Tutorial 4

  1. The Mid-Autumn Festival will always fall between 8/9 and 8/10. In 2005 it fell on 18/9. When do you think it fell in 2006?
  2. Why was it necessary for the Chinese to have more than one hundred calendar reforms, while there were only two in the West?
  3. What are the three criteria MUIS looks at when determining the the start of the Muslim month in Singapore?
  4. Why was the Mid-Autumn Festival celebrated on different days in China and Hong Kong in 1978?

Helmer Aslaksen
Department of Mathematics
National University of Singapore

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