Adar

large, the sixth month of the civil and the twelfth of the
ecclesiastical year of the Jews (Esther 3:7, 13; 8:12; 9:1, 15,
17, 19, 21). It included the days extending from the new moon of
our March to the new moon of April. The name was first used
after the Captivity. When the season was backward, and the lambs
not yet of a paschal size, or the barley not forward enough for
abib, then a month called Veadar, i.e., a second Adar, was
intercalated.