I calculated sun/shade exposure for every seat at World Cup stadiums

Show HN: I calculated sun/shade exposure for every seat at World Cup stadiums

I calculated sun/shade exposure for every seat at World Cup stadiums operates in show hn launch.

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Last year, I went to a game at a stadium I had never visited (Arrowhead). Ended up baking in the sun for the entire second half. Afterwards, was surprised I couldn't find a tool that told me where the sun would actually be during games.So for WC2026 I built SeatSun: a free tool (no sign up needed) that calculates sun/shade exposure for every section at the World Cup 2026 stadiums depending on date and match time.The technical core: solar azimuth and altitude calculations (based on Meeus astronomical algorithms, ~0.3 degree accuracy) tied to each stadium's orientation and GPS coordinates. For each open-air stadium I mapped the seating sections to compass bearings, then render an interactive o

I calculated sun/shade exposure for every seat at World Cup stadiums is positioned in show hn launch, a segment that rewards a clear, focused offering.

Its current recorded stage is Show HN launch.

Website: seatsun.com