It determines the dates for Jewish holidays and the appropriate public reading of Torah portions, yahrzeits (dates to commemorate the death of a relative), and daily Psalm readings, among many ceremonial uses. The Hebrew calendar ( Hebrew: הַלּוּחַ הָעִבְרִי, romanized: HaLuah HaIvri), also called the Jewish calendar, is a lunisolar calendar used today for Jewish religious observance and as an official calendar of Israel.