Karwa Chauth in 2026 will be observed on Thursday, October 29, falling on the Chaturthi tithi. Married women typically undertake a day-long fast, praying to Goddess Gauri for their husbands' long life, health, and marital harmony. The festival holds deep religious significance in Hindu tradition and is associated with legends, including one from the Mahabharata involving Lord Krishna and Draupadi, highlighting devotion and spiritual strength.