This book "Ekadashi, a significant day of observation in Hinduism, on this days having fast in spiritual way which help to balance our mind and body and keep metabolism healthy . It holds deep spiritual meaning and is rooted in rich historical origins. This article aims to provide a comprehensive understanding of Ekadashi, shedding light on its spiritual significance, scientific rationale, various vratas (fasting), mythological tales, rituals and practices, celebrations, health benefits, social impact, and its relevance in today's modern era.