[1] : The Collaborative International Dictionary of English v.0.48

jewish calendar \jew"ish cal"endar\
   a lunisolar calendar in use among hebraic peoples, reckoning
   from the year 3761 b. c., the date traditionally given for
   the creation.

   note: it received its present fixed form from hillel ii.
         about 360 a. d. the present names of the months, which
         are babylonian-assyrian in origin, replaced older ones,
         abib, bul, etc., at the time of the babylonian exile.
         nineteen years constitute a lunar cycle, of which the
         3d, 6th, 8th, 11th, 14th, 17th, and 19th years are leap
         years. the year 5663 1902-3 a. d. was the first year
         of the 299th lunar cycle. the common year is said to be
         defective, regular, or perfect or abundant according
         as it has 353, 354, or 355 days. the leap year has an
         intercalary month, and a total of 383 defective, 384
         regular, or 385 perfect, or abundant days. the
         calendar is complicated by various rules providing for
         the harmonious arrangement of festivals, etc., so that
         no simple perpetual calendar can be constructed. the
         following table gives the months in order, with the
         number of days assigned to each. only three months vary
         in length. they are: heshvan, which has 30 days in
         perfect years; kislev, which has 30 days in regular and
         perfect years; and adar, which has 30 days in leap
         years. the ecclesiastical year commences with nisan and
         the civil year with tishri. the date of the first of
         tishri, or the jewish new year, is also given for the
         jewish years 5661-5696 1900-1935 a. d.. from these
         tables it is possible to transform any jewish date into
         christian, or vice versa, for the years 1900-1935 a. d.
         months of the jewish year. 1 tishri . . . . . . 30 2
         heshvan . . . . . 29 r.  d. or 30 p. 3 kislev . .
         . . . . 29 d. or 30 r.  p. 4 tebet . . . . . . 29
         5 shebat . . . . . . 30 6 adar . . . . . . . 29 or 30
         l. -- veadar . . . . . 29 occuring only in leap
         years 7 nisan . . . . . . .30 8 ivar . . . . . . ..29
         9 sivan . . . . . . .30 10 tammux . . . . . . 29 11 ab
         . . . . . . . . 30 12 elul . . . . . . ..29

[2] : WordNet (r) 2.0

jewish calendar
     n : judaism the calendar used by the jews; dates from 3761 bc
         the assumed date of the creation of the world; a lunar
         year of 354 days is adjusted to the solar year by
         periodic leap years syn: hebrew calendar
see also:
hebrew calendar 

Jewish Calendar >> J Words
Jewish Calendar, definition of term: Jewish Calendar
jewish+calendar_pag1.html

Calendar >> C Words
Calendar, definition of term: Calendar
calendar_pag1.html

Jewish >> J Words
Jewish, definition of term: Jewish
jewish_pag1.html

Calendar Year >> C Words
Calendar Year, definition of term: Calendar Year
calendar+year_pag1.html

Calendar Month >> C Words
Calendar Month, definition of term: Calendar Month
calendar+month_pag1.html

Jewish Religion >> J Words
Jewish Religion, definition of term: Jewish Religion
jewish+religion_pag1.html

Calendar Week >> C Words
Calendar Week, definition of term: Calendar Week
calendar+week_pag1.html

Roman Calendar >> R Words
Roman Calendar, definition of term: Roman Calendar
roman+calendar_pag1.html

Julian Calendar >> J Words
Julian Calendar, definition of term: Julian Calendar
julian+calendar_pag1.html

Muslim Calendar >> M Words
Muslim Calendar, definition of term: Muslim Calendar
muslim+calendar_pag1.html