Why does the date of Hanukkah keep changing?

Just updated for 2016!

Saturday evening, December 24th, is the first night of Hanukkah this year. I think it was much earlier in December last year. Why isn't it always on the same date? Students look at the Hebrew calendar and appreciate the incredible mathematics involved in creating a calendar that aligns both the moon's rotation about the Earth and the Earth's rotation about the Sun.

The activity: hebrew-calendar2016.pdf

For members we have solutions for this activity below.

hebrew-calendar2016.docx     hebrew-calendar2016-solutions.pdf

CCSS: 5.NBT, 5.OA, 6.SP, 8.SP, S-IC

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