India, the world’s third largest emitter, formally joined the Paris Agreement on climate change on Sunday, putting the agreement on the cusp of entry into force.

As Rebecca Hersher reports for NPR, “India’s ambassador to the U.N., Syed Akbaruddin, smiled as he delivered the ratified agreement to the international body’s office of legal affairs. The ceremony was held in front of a banner depicting Mahatma Gandhi and recognizing Oct. 2, the Indian peace leader’s birthday, as an international day of nonviolence.

Indian President Narendra Modi, who chose the date purposely, referenced Gandhi in a celebratory tweet:

The message of Gandhi Ji inspires all of us. India will always work with the world to overcome climate change & create a green planet. https://t.co/IgGDJwPG4m

— Narendra Modi (@narendramodi) October 2, 2016