Also known as Karthika Deepam, this annual observance is celebrated when Karthigai Nakshatra prevails during Ratrimana on a full moon day in the month of Karthigai. As we prepare to celebrate Karthika Deepam 2022, here is everything you need to know about this day, how to celebrate Karthika Deepam and its significance. 🙏🏻 Karthigai Deepam 2022 Date and Significance: Know All About Thiruvannamalai Deepam Rituals and How the Festival Is Celebrated.