Feel the day, pick a shade.
No forecasts - just your gut against your town.
The record answers at 18:00.
Today vs. 30 years of this exact date.
Your year fills in.
Every call becomes a square. Streaks. And a rival, if you dare.
Why does the verdict wait until 18:00?
That's the game. Locking your call before the day plays out is the whole point, so the verdict only opens once the day has mostly happened, at 18:00 local time.
Why does it need my location?
We use it once, on-device, to find your town's 30-year weather record and snap it to a roughly 25 km grid cell. Nothing else in the app needs to know where you are.
"This town isn't covered yet"?
We're expanding record coverage region by region. If your town isn't covered yet, Duels still work — invite a rival and play in their town instead.
How do Duels work?
Pick one rival, agree on a shared town, and make your calls independently. Invite them with a link or an 8-character code they can enter by hand.
How do I delete my data?
Email us at zdenek@zspacek.com and we'll delete your account's rows.
Does it work outside Europe?
Wherever a 30-year weather record exists for a location, Thirty Summers can use it. Coverage is expanding outward from Europe.
Questions, bugs, or anything else: zdenek@zspacek.com.