When Is Twins Day 2024. This annual international event is recorded as the “largest annual gathering of twins in the world” by the guinness book of world records. This event is considered the largest annual gathering of twins on the planet and draws people from not only all across the u.s.

This special day aims to honor the unique bond only twins can understand. The twins days festival, in twinsburg, ohio, is the world’s largest annual gathering of twins!