Prior to 2012, the annual tournament is held over two days, typically on a weekend in June, before the highest category tournament was reorganized as the Sevens Grand Prix Series, modeled after the format of the World Rugby Sevens Series.As women's rugby union developed in the 1960s and 1970s the format became very popular as it allowed games, and entire leagues, to be developed in countries even when player numbers were small, and it remains the main form the women's game is played in most parts of the world.Over the next decade the number of tournaments grew, with almost every region developing regular championship competitions.Since then, the regional 7s championships have periodically served as pre-qualifying competitions for the Rugby 7s World Cup, or other sevens tournaments.The following are details of all regional women's international championships played in Europe, listed chronologically with the earliest first, with all result details, where known (included are the FIRA–AER Women's Sevens and other official regional championships, e.g. the Europe Emerging Nations tournaments).