Board Thread:Game Updates/@comment-3502824-20180328015558/@comment-32647310-20180416170700

Pasta-machine006 wrote: Interpretation "夏までに" is difficult. It may be before summer comes, or it may be in the summer. In Japan, the summer is roughly June to August, so it will be implemented by then. ...21 June is summer for the northern hemisphere.

The way I see it is that 'by summer' could be before done before summer starts, or sometime after it starts, but before it ends.