Portal:Judaism/holidays/Rosh Chodesh

Rosh Chodesh is the first day of every month in the Hebrew calendar, marked by the appearance of the new moon. Contrasted with the astronomical definition of new moon - which is not visible to the naked eye - the new moon in the Hebrew calendar is marked by the day and hour that the new crescent is observed. It is considered a minor holiday, akin to the intermediate days of Passover and Sukkot. When a month consists of thirty days, the final day is considered the first day of Rosh Chodesh of the following month.

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