The legendary event was announced to go from 17th to 21st. In usual English language this means including the last day.

Also, it was emphasized in the event calendar for August to CLEARLY include 21st.


This is highly annoying. I had saved up kobans to burn on the last evening if I hadn't gotten the girl earlier. Now that's gone.
If you want players in the game, make sure the rules are clear and consistent. Or there is no game.