Simhasth 2016 was a major religious event held in Ujjain, India from April 22 to May 21, 2016. Over 5 crore pilgrims were expected to attend, with the largest crowds of over 1 crore predicted on bathing days. Extensive infrastructure and facilities were developed over years of planning to ensure security, cleanliness, and services for pilgrims. A comprehensive monitoring system utilized GIS, drones, CCTV, mobile apps, and web portals to track infrastructure development and respond to needs. Cultural programs also enriched the experience for those attending the important 30-day Hindu religious festival.