Karthika masam is the eighth lunar month of Indian Astrology. It comes around November of Gregorian calender. Karthika masam is considered very sacred and there are many reasons for it.
Importance of Karthika masam
Lord Vishnu goes to sleep on Ashadha suddha ekadashi and wakes-up on Karthika suddha ekadashi
Lord Shiva kílled Tripurasuras on Karthika pournami and protected the world
In this month Ganga (Godess of river Ganges) enters in to all rivers, canals, ponds and wells and makes them as pious as Ganga.