Solstice Cipher

Bring back the light.

Six encrypted messages stand between you and the longest day of the year. Crack each cipher and the sun climbs higher — one June celebration at a time.

In June 1941, the codebreakers at Bletchley Park were reading messages no one was ever meant to read. Their secret weapon wasn't a key — it was frequency analysis: the quiet statistical fact that some letters simply appear more than others. A young mathematician named Alan Turing turned that insight into machines, and those machines into the dawn of computing.

Each puzzle below is a substitution cipher. Every letter has been swapped for another, consistently. Use the frequency panel, trust the patterns, and decode messages celebrating Pride, Juneteenth, the World Cup, and the solstice itself.

Built for the June Solstice Game Jam · A code-breaking ode to Alan Turing · Decode the light. ☀