The World Congress on Smoking and Health was first held in new york on 1967. 1980, the World Health Organization put forward the slogan "Choose whether to smoke or be healthy" and designated this year as the "year of no smoking". 1987, the General Assembly of the United Nations World Health Organization made a resolution to designate April 7th 1988, the 40th anniversary of the establishment of the World Health Organization, as the first "World No Tobacco Day". Starting from 1989, the "World No Tobacco Day" is set on the day before International Children's Day, that is, May 3 1 day. http://www.ahpapl.org/qyyc/ShowInfo.asp? Info id = 477 Go to this website and you will learn more.