The end of the month doesn't necessarily mean the end of the deals this summer as the transfer window closes at separate times in different places.
Starting with the English window, among others, on August 31, there is no cut and dry closure across the continent.
Those in Germany, the Netherlands, Italy and France follow the precedent set by British football although LaLiga plans to wait an extra 24 hours.

Transfer window deadlines across Europe:
August 31: England, Scotland, Italy, Germany, Netherlands, Russia, Belgium
September 1: Spain, Ukraine
September 8: Turkey, Czech Republic
September 22: Portugal