On Yom Kippur, the traditional and most common greeting is "G’mar chatima tovah," which means "a good final sealing," referring to the sealing of a person's fate for the coming year. Another widely used greeting is "Tzom kal," meaning "an easy fast," acknowledging the fasting done on this holy day. Other appropriate greetings include "Shanah tovah" (a good year), "Have a meaningful fast," and general holiday wishes like "Chag sameach" (happy holiday) or "Yom tov" (good day). It is generally more fitting to use reflective and respectful greetings rather than saying "Happy Yom Kippur," because the day is solemn and focused on atonement and repentance.
