The shofar is blown in synagogue services on Rosh Hashanah and at the end of Yom Kippur; it is also blown every weekday morning in the month of Elul running up to Rosh Hashanah.

When should shofar be blown?

The Talmud specifies that the shofar is blown on two occasions on Rosh Hashana: once while "sitting" (before the Mussaf prayer), and once while "standing" (during the Mussaf prayer). This increases the number of blasts from the basic requirement of 30, to 60.

What is a shofar and when is it blown?

It's called Yom Teruah, the day of blasting the shofar (ram's horn). The shofar is sounded 100 times during a traditional Rosh Hashanah service. And a long and loud shofar blast marks the end of the fast day of Yom Kippur. While the blower must first take a big breath, the shofar only sounds when the air blows out.