A weekly feature of Torah Tidbits to help clarify practical and conceptual aspects of the Jewish Calendar, thereby better fulfilling the mitzva of HaChodesh HaZeh Lachem...
All months have a fixed number of days - either 29 or 30. Except Cheshvan and Kislev, whose number of days vary. In a "normal" year, Cheshvan has 29 days and Kislev has 30. In a "full" year, both have 30. In a "diminished" year both have 29 days. 5765 is a 13-month diminished year with 383 days
ROSH CHODESH KISLEV YIH-YEH MACHAR B'YOM RISHON HABA
ALEINU V'AL KOL YISRA'EL L'TOVA
HAMOLAD HAYA ETMOL, YOM SHISHI, ARBA'IM V'ARBA DAKOT
V'CHELEK ECHAD ACHAREI SHTAYIM BATZAHARAYIM