Adar I is the sixth month of the Hebrew calendar, which is a lunisolar calendar used primarily for Jewish religious observances. It typically falls between February and March in the Gregorian calendar. Adar I is significant because it is the month that precedes Adar II in leap years, which occur seven times in a 19-year cycle. During Adar I, the Jewish people prepare for the upcoming festival of Purim, which is celebrated in Adar II. The month is associated with joy and celebration, as it is believed that good fortune and happiness are heightened during this time.