Homecoming is the tradition of welcoming back alumni of a school. It most commonly refers to a tradition in many universities

University

A university is an institution of higher education and research, which grants academic degrees in a variety of subjects. A university is an organisation that provides both undergraduate education and postgraduate education...

, college

College

A college is an educational institution or a constituent part of an educational institution. Usage varies in English-speaking nations...

s and high school

High school

High school is a term used in parts of the English speaking world to describe institutions which provide all or part of secondary education. The term is often incorporated into the name of such institutions....

s in North America

North America

North America is a continent wholly within the Northern Hemisphere and almost wholly within the Western Hemisphere. It is also considered a northern subcontinent of the Americas...

. It usually includes activities for students and alumni, such as sports and culture events and a parade through the streets of the city or town.
Homecoming is an annual tradition of the United States

United States

The United States of America is a federal constitutional republic comprising fifty states and a federal district...

. People, towns, high schools and colleges come together, usually in late September or early October, to welcome back alumni and former residents.