The Magh Mela in Prayagraj, a significant religious event, features the practice of Kalpavas, where devotees live on riverbanks for a month. This period involves daily holy dips in the Ganga, fasting, meditation, and prayers, aiming to cleanse sins and attain spiritual liberation. Pilgrims from India and abroad participate, with Kalpavas typically commencing around Paush Purnima or Makar Sankranti and concluding by Magh Purnima or Maha Shivratri.