NumberNut
Number Nut: Calendar Origins
History and mathematics merge in this lesson that explores the origin of the calendar. Learn how it all got started in this detailed lesson that includes a simple months of the year game and a more challenging time conversion game. Both...
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Western Washington University: Leap Year
It takes the entire page but by the end of it, you will understand the whys and whens of Leap Year Day.
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Torah.org: Seven Questions About Rosh Hashanah
A question-and-answer fact sheet about Rosh Hashanah that addresses when, why, and how the festival is observed. Tells why the shofar is sounded on this day and why apples dipped in honey are eaten. Also explains the differences between...