On which of the following days International Day of Older Persons is celebrated?
International Day of Older Persons is observed on 1 October every year. On 14 December 1990, the United Nations General Assembly designated 1 October the International Day of Older Persons. This was preceded by initiatives such as the Vienna International Plan of Action on Ageing which was adopted by the 1982 World Assembly on Ageing and endorsed later that year by the UN General Assembly. The theme of the 2015 commemoration is “Sustainability and Age Inclusiveness in the Urban Environment”.