Kartik Amavasya (Amavasya in Kartik Month) is the fifteenth day of Kartik Maas in North Indian Hindi calendars (Purnimant Panchang). In 2025, Kartik Krishna Amavasya date is October 20|21.
This day coincides with Amavasya in Ashwin Month in Amavasyant Chandramana Panchang followed in Andhra Pradesh & Telangana (Telugu Panchangam), Karnataka (Kannada Panchanga), Maharashtra (Marathi Panchang), Goa (Konkani Panchang), Gujarat (Gujarati Panchang).
In 2018, this day corresponds with a day in Thulam Masam in Malayalam calendar, Aippasi Masam of Tamil calendar, Kartik Mash in Bengali calendar, Kartik Month in Nepali calendar.
Kartik Amavasya is mentioned as Deepavali, Diwali, Lakshmi Pujan, Kedara Gauri Vrat (Kedareshwara Vratham), etc in Puranas. Kartik Maas Nakt Vrat, Deepdaan Vrat, other general Vratas in Kartik Maas are observed as usually on this day.