What is the importance of June 21 st?

June 21st is significant for several reasons, most notably as the summer solstice in the Northern Hemisphere, marking the longest day of the year and the official start of summer. It is also celebrated in various cultures around the world, often associated with festivals and rituals that honor the sun and the changing seasons. Additionally, June 21st is recognized as International Yoga Day, promoting the benefits of yoga and mindfulness globally.