I HOPE they open it for the whole summer, cuz we have no school then that is my dreammm
Unfortunately, the game hasn't been built up enough for us to have the servers open for the whole summer, and although our servers are much stronger now, they still need to be monitored while they're open, as they still have a few problems with large amounts of people on them.
Plus, right now, it's easier for us to work on the game with the servers closed rather than open. There's also the fact that we haven't yet put in a way for people to update their client without just downloading an entire new client, but that's because there isn't really a reason to yet. So, if we kept the game open for the entire summer, that's three months where little to no progress would be made on the game.