The summer transfer window, which is the period during the year in which a football club can remove players out of their team, opened on 1 July 2015 and ended on 1 September 2015.
According to the rules, each national football association decides on the time (such as the dates) of the 'window' but it may not exceed 12 weeks. The second registration period occurs during the season and may not exceed four weeks. The system has been used in many European leagues before being brought into compulsory effect by FIFA during the 200203 season. The specific periods depend on the league's season cycle and are determined by the national football authorities. Most major European leagues commence in the second half of the year (e.g. August or September) and stretch over two calendar years to the first half of the next year (e.g. May), resulting in a close season window in the Summer ending in August, and a mid-season window in January. 1 July  2 September 1 July  2 September Italy France, Germany, Spain Premier League clubs in England voted to end the summer window on the Thursday before the start of the season - on August 9 in 2018, instead of August 31. 
