A.B.D
Arabic Bible Dictionary
MONTH
MONTH Among the Egyptians the month of thirty days each was in use
long before the time of the Exodus, and formed the basis of their
calculations. From the time of the institution of the Mosaic law the month
among the Jews was lunar. The cycle of religious feasts depended on the
moon. The commencement of a month was determined by the observation
of the new moon. The number of months in the year was usually twelve (1
Kings 4=>7; 1 Chronicles 27=>1-15); but every third year an additional month
(ve-Adar) was inserted, so as to make the months coincide with the
seasons.
“The Hebrews and Phoenicians had no word for month save ‘moon,’ and
only saved their calendar from becoming vague like that of the Moslems by
the interpolation of an additional month. There is no evidence at all that
they ever used a true solar year such as the Egyptians possessed. The
latter had twelve months of thirty days and five epagomenac or odd
days.”, Palestine Quarterly, January 1889.