pretty much, take a look at the dates this year, they are representative, not easy for me to recall here and now and I might be wrong bet premier league starts the earliest at early to mid August, followed by the germans and french, germans take a more extended break during the new year/christmas vacation, while the epl goes on with little break time. The epl is also the most demanding of all three with the most games played, what with all the no. of teams and various cup games. There are small differencies between each league but they all have the same off dates for their country team games during their seasons. World cup and Euro nation cup finals factor in whenever they take place in scheduling.
That's the gist, and like I said I may be wrong in the exact order of the major leagues, take a look at some results site for the dates.
