Tonight starts Yom Teruah; Day of the trumpet blast. This is such a significant holy day. It is the start of the fall feasts and represents Messiahs return.
The traditional greeting is LaShana tovah which means, good year. In which you respond, tikatevu, which means, may we be enscribed. It is speaking of the Book of Life.

Chag Sameach! Happy holiday!
May your name be enscribed in the Book of Life.