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).
(the year; is divided; into twelve months) (an extra month; inserted; T:after every month) (two new moons; occur; T:once in three years; L:every month)
the year an extra month two new moons
is divided inserted occur
into twelve months
T:after every month
T:once in three years L:every month