This year, the Earth Hour which took place on 23rd of March attracted a massive international interest. Many National Associations and Hostels within the HI network contributed to its success, motivating others to join. This year, the Earth Hour which took place on 23rd of March attracted a massive international interest. Many National Associations and Hostels within the HI network contributed to its success, motivating others to join. This year, the Earth Hour which took place on 23rd of March attracted a massive international interest. Many National Associations and Hostels within the HI network contributed to its success, motivating others to join. This year, the Earth Hour which took place on 23rd of March attracted a massive international interest. Many National Associations and Hostels within the HI network contributed to its success, motivating others to join. This year, the Earth Hour which took place on 23rd of March attracted a massive international interest. Many National Associations and Hostels within the HI network contributed to its success, motivating others to join.