2021 (MMXXI) was a common year starting on Friday of the Gregorian calendar, the 2021st year of the Common Era (CE) and Anno Domini (AD) designations, the 21st year of the 3rd millennium and the 21st century, and the 2nd year of the 2020s decade. The United Nations declared 2021 as the International Year of Peace and Trust, the International Year of Creative Economy for Sustainable Development, the International Year of Fruits and Vegetables, and the International Year for the Elimination of Child Labour.