The Eratosthenes Festivity has become an annual tradition that takes place every year on the 21st of June at the Bibliotheca Alexandrina; and 20 and 21 June at the city of Aswan. It is designed for preparatory school students, and includes a series of activities that revolve around the methodology Eratosthenes applied in measuring the Earth’s circumference 2000 years ago.

On the 21st of June, the day of summer solstice, the 21st century school students conduct Eratosthenes’ experiment on the BA Plaza, and in Aswan (Upper Egypt) to measure the circumference of Earth.