In honor of the International Day of Happiness on Wednesday, the United Nations General Assembly released its annual report highlighting the happiest countries in the world. In fact, the U.S. ranks 23rd in the 2024 World Happiness Report, its decline in the rankings driven by "a large drop in the wellbeing of Americans under 30. Afghanistan remains at the bottom of the overall rankings as the world’s 'unhappiet' nation, the report said.