"About 5,000 events will be held across the country to mark International Day for Yoga (IDY)," a senior official from AYUSH ministry said.
Besides, celebrations will take place in 150 countries with Indian missions coordinating activities in landmark places such as Eiffel Tower in Paris, Trafalgar Square in London and Central Park in New York, the official said.
Elaborate security arrangements have been put in place with commandos and paramilitary forces deployed to ensure that nothing goes wrong.
On Sunday, Modi had shared photographs of practise sessions in the run-up to Yoga Day in several countries through his Twitter handle.
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Pictures from places like Bhutan, Afghanistan, New Zealand, China and Japan are already being shared on social media.
In Delhi, eight events have been planned in the national capital with the main event being held in Connaught Place.
Events are being planned in each district in the country. Besides, various departments, state governments and institutions will also be conducting their own programmes.
The PM's Award for Outstanding Contribution for Promotion and Development of Yoga at the national and international level will be given tomorrow to individuals and organisations.
The centrepiece of the first IDY celebration on June 21, 2015 was New Delhi's Rajpath. The event made it to the Guinness World Records with 35,985 participants performing asanas at one venue and 84 nationalities being part of it. Last year, the main function was in Chandigarh.