It’s Rosh Hashanah, the Jewish New Year. Unlike the western new year celebration, the Hebrew new year is somewhat more solemn, although both feature (at least a little) introspection and resolutions for living a better life in the coming year.
Rosh Hashanah means “the head (or first) of the year.” It’s a traditional term, not found in scripture. The actual day, instituted in Leviticus 23:24-25, is Yom Ha-Zikkaron (the day of remembrance) or Yom Teruah (the day of the sounding of the shofar).
The common greeting “L’shanah tovah” means “for a good year,” and is a shortened version of “L’shanah tovah tikatev v’taihatem” (or to women, “L’shanah tovah tikatevi v’taihatemi”), which means “May you be inscribed and sealed for a good year.”
By the Jewish calendar, it has been 5776 years since God created the world.
There are several practices or rituals for this day – learn more here.