Hindu calendar

from WordNet (r) 3.0 (2006)

Hindu calendar
    n 1: the lunisolar calendar governing the religious life of
         Hindus; an extra month is inserted after every month in
         which there are two new moons (once every three years)

from The Collaborative International Dictionary of English v.0.48

Hindoo calendar \Hin"doo calendar\ or Hindu calendar \Hindu
calendar\ .
   A lunisolar calendar of India, according to which the year is
   divided into twelve months, with an extra month inserted
   after every month in which two new moons occur (once in three
   years).

   Note: The intercalary month has the name of the one which
         precedes it. The year usually commences about April 11.
         The months are follows: Baisakh . . . . . . . . . .
         April-May Jeth . . . . . . . . . . . . . May-June Asarh
         . . . . . . . . . . . . June-July Sawan (Sarawan) . . .
         . . . . July-Aug. Bhadon . . . . . . . . . . .
         Aug.-Sept. Asin (Kuar). . . . . . . . . . Sept.-Oct.
         Katik (Kartik) . . . . . . . . Oct.-Nov. Aghan . . . .
         . . . . . . . . Nov.-Dec. Pus . . . . . . . . . . . . .
         Dec.-Jan. Magh . . . . . . . . . . . . . Jan.-Feb.
         Phagun (Phalgun) . . . . . . . Feb.-March Chait . . . .
         . . . . . . . . March-April
         [Webster 1913 Suppl.] Hindooism