UN4U is a week-long programme commemorated prior to UN Day in October. This event marks the celebrations of UN birthday on the 24 October every year. The staff members of the United Nations, including senior officials, speak at local schools on the occasion of UN Day to share their different programmes and activities they work with to bring peace in the world.

Schools are usually asked to assemble a number of students for an hour-long presentation. In South Africa, the initiative is part of the United Nations Communication Group (UNCG) to promote UN awareness to learners and students.