Facebook President and CEO Mark Zuckerberg uploaded a video of himself blowing the shofar along with wishes for a happy new year to his personal Facebook page.

Usually discreet about his Jewish identity, Zuckerberg surprised his millions of followers with a message that included one of the most significant and recognizable symbols of Jewish tradition.

“I got a little carried away in my ”Teruah,” Zuckerberg joked. He also explained to curious followers the significance and importance of the Jewish New Year and the symbolism of the shofar.

Rosh Hashanah’s most important commandment is listening to the Shofar. The Shofar is an animal’s horn that has been modified by removing the filling from the horn’s corneal sheath and opening a mouthpiece at the narrow end.