Short answers, pulled from the story.
The International Day of Non-Violence is observed every year on the 2nd of October. That date was chosen because it is the birthday of Mahatma Gandhi, and it coincides with the Indian national public holiday of Gandhi Jayanti.
The United Nations General Assembly established the International Day of Non-Violence on the 15th of June 2007, through resolution A/RES/61/271.
The proposal originated with a Hindi teacher in Paris who was teaching international students. Iranian Nobel laureate Shirin Ebadi brought the idea to the World Social Forum in Mumbai in January 2004.
The day is intended to disseminate the message of non-violence through education and public awareness, and to reaffirm a desire for a culture of peace, tolerance, understanding, and non-violence. It is not a public holiday but is observed around the world, often to draw attention to global issues.
At a Satyagraha Conference in New Delhi in January 2007, Indian National Congress President and Chairperson of the United Progressive Alliance Sonia Gandhi and Archbishop Desmond Tutu both backed a resolution calling on the United Nations to adopt the observance.
Yes. A bust of Mahatma Gandhi was installed in the North Lawn Gardens of the United Nations headquarters in New York. It was a gift from India to the UN and is the first Gandhi sculpture at that location. External Affairs Minister S. Jaishankar and UN Secretary-General Antonio Guterres unveiled it together.