J.League x Pokémon

I'm not interested in soccer, so I just want to do the Timed Research and spin the special PokéStops. As long as it's during the season, I can go anytime, right? I wonder when the special PokéStops will be set up on the first day... Since it starts tomorrow in my area, if it's early, I'd like to go before the match... I don't really get it 💦