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2021 June solstice on 21 June

17 schools from Asia, America, Africa and Europe participated to this event

12 European, aAsian, and American schools shred their results with 7 Egyptian schools for Eratosthenes festivities in Bibliotheca Alexandrina

4 continents, 11 countries, 17 Schools, 155 measurements

4 continents, 12 countries, 21 Schools, 195 measurements

4 continents, 15 countries, 31 Schools, 185 measurements

4 continents, 12 countries, 18 Schools, 118 measurements

2 continents, 7 countries, 13 Schools, 86 measurements

3 continents, 10 countries, 20 Schools, 73 measurements

3 continents, 9 countries, 16 Schools, 68 measurements

2 continents, 8 countries, 13 Schools, 84 measurements