It seems there might be a misunderstanding or a typo with the word "margasivsa." The correct term you might be referring to is "Margashirsha" or "Margashirsha month," which is indeed the ninth month of the Hindu calendar. Here’s a simple explanation of this term for a new English learner:
Margashirsha (noun): The ninth month of the Hindu lunar calendar, which usually falls between November and December in the Gregorian calendar. It is often associated with specific festivals and rituals in Hindu culture.
"During Margashirsha, many Hindus celebrate the festival of Kartik Purnima."
"Margashirsha" is a term that refers to an important month in the Hindu calendar. It is used to discuss cultural practices and festivals specific to that time.