Q&A for How to Blow a Shofar

The shofar should be played exclusively during Rosh Hashana and Yom Kippur. It should not be played during regular Shabbat services or other holidays.

Yeah, you can do that, but it's not quite blowing a Shofar nor do you fulfil the Mitzvah correctly.

You are free to blow shofar the rest of the year (except on Shabbat, holidays, and other days when it is prohibited to make music). It is only on the days of Rosh Hashana and Yom Kippur themselves that there is a specific prohibition against blowing shofar. In fact, some congregations blow the shofar each day (except Shabbat) for the entire month of Elul.

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