When does the third season start?

I'm pretty sure it won't start until some time in the fall. I don't know any exact dates :P

There is no exact 日付 yet. 狐, フォックス just release their fall schedule but it will be awhile until they release the premiere dates. it falls normally in mid september

omglee i wanna know too!! and i was searching the web bout it and someone 発言しました september 21st? but idk! soo!! im excited for it! imin 愛 with finn!!