Make the daily puzzle the same for every player, whatever their time zone

A daily challenge only works if everyone gets the same one, yet phones disagree about what day it is, and a random pick differs per player. This entry shows how to derive the day, the puzzle number and the seed from one clock reading and when the next puzzle arrives.

Why this works

Phones disagree about local dates, but they all agree on how much time has passed since one fixed moment. Counting whole days from that moment gives everyone the same number, and anything built only from that number comes out identical for every player.

When not to use it

Skip it when the puzzle should differ per player, or when players may start whenever they like, such as a level that is always available. Then a shared daily clock only adds a deadline nobody asked for; hand out puzzles in order instead.

In the full entry

• What to build, step by step
• Starting values and the reason for each
• 4 common mistakes and the fix
• A diagram of every state
• 21 lines of example code with 4 checks that pass
• How your AI shows you that it works

Say this to your AI

Use the Spielerando entry "Make the daily puzzle the same for every player, whatever their time zone" (read_entry daily-puzzle-same-for-everyone) in my game. Build it step by step, and show me how you checked that it works.

Or skip this and connect the MCP: your AI then finds all of this by itself.Connect the MCP