Karwa Chauth 2026 date and time: Karwa Chauth 2026 will be observed on Wednesday, October 28. The festival is traditionally marked by a day-long fast, evening puja and moon worship, with devotees breaking the fast after sighting the moon. Here are the Karwa Chauth 2026 date, fasting time, puja muhurat, moonrise timing, Chaturthi Tithi and significance.