Month. Genesis 8:4. The ancient Hebrews called the months by their numbers; as first month, second month, third month, etc., and also had a name for each month. They likewise had a civil and a sacred year. The sacred year was used in computing their festivals, and chiefly by sacred writers. The civil year was used in reckoning their jubilee, the reign of kings, and birth of children. The length of the month depended on the changes of the moon. The names of the Hebrew months follow:
Twelve lunar months, making 354 days and six hours, made the Jewish year short of the Roman by twelve days. To compensate for this difference, the Jews about every three years, or seven times in 19 years, intercalated a thirteenth month, which they called Vedar, the second Adar. by this means their lunar year equalled the solar.