Breaking News Live Updates: What began as an ancient Indian practice is now a global movement celebrated by millions across continents. Addressing International Yoga Day celebrations in Kolkata, Prime Minister Narendra Modi said that June 21, known as the longest day of the year in the Northern Hemisphere, has also evolved into the world's largest community celebration because of yoga. He highlighted how the practice has crossed borders, languages and cultures to unite people through a shared focus on health and well-being.