Karwa Chauth 2026 will be observed on Thursday, October 29. The upawasa fasting time runs from 6:31 am to 8:11 pm, with moonrise expected around 8:11 pm. The puja muhurat is from 5:38 pm to 6:56 pm. Married women fast from sunrise to moonrise, praying for their husbands' longevity and well-being.