The United Nations General Assembly (UNGA) officially begins annually on the third Tuesday of September and runs intensively from September to December. It then resumes in January and continues until all agenda items are addressed, which is often just before the next session starts. The session typically lasts almost the entire year, but the most intense period with the general debate and main committee work is concentrated in the September to December timeframe. The high-level General Debate, where world leaders deliver their speeches, generally takes place over about nine working days starting shortly after the session opens. The debate sessions run daily in two parts: morning and afternoon until all scheduled speakers have spoken. For example, the current (80th) UNGA session began on September 9, 2025, with high-profile meetings running through several weeks in September, but the full session will last through much of the year until the agenda is completed. In summary, the UN General Assembly session formally lasts nearly a full year, with its busiest, most public period concentrated in the fall months of September through December, and then resumes in January if necessary.
