Prime Minister Narendra Modi is all set to pilot the fourth International Yoga Day Celebrations on June 21.

Joined by thousands of volunteers, Modi will perform Yoga asanas on the lawns of Forest Research Institute in the hill station in Dehradun.

The world as a whole is preparing for Yoga related events to mark the occasion.

Modi is of the opinion that Yoga is one of the most precious gifts given by the ancient Indian sages to humankind.

"Yoga is not just a set of exercises that keeps the body fit. It is a passport to health assurance, a key to fitness and wellness. Nor is Yoga only what you practice in the morning. Doing your day-to-day activities with diligence and complete awareness is a form of Yoga as well," said Modi.

"In a world of excess, Yoga promises restraint and balance. In a world suffering from mental stress, Yoga promises calm. In a distracted world, Yoga helps focus. In a world of fear, Yoga promises hope, strength and courage," he added.

As a part of the occasion, Modi has shared the intricacies of various Yoga Asanas over social media. He has also shared pictures of people performing Yoga, at various locations across the world.

International Yoga Day is celebrated on June 21 every year since it began in 2015.