Make days long in summer and short in winter, with dawn and dusk to match

A seasonal world needs sunrise and sunset that move through the year, so winter nights hurt and summer evenings are a gift. Here is a smooth curve for day length, where in the year it peaks, and how the year wraps without a jump.

Why this works

Real daylight does not jump between seasons, it swells and shrinks smoothly, and slowest near the longest and shortest days. A smooth wave through the year, anchored at noon, gives that feel, and every other time of day can be derived from it.

When not to use it

Skip it in a game with a short, fixed day, like a quick arcade round, or one where seasons are chosen by the story. A set of fixed day lengths, one per season, is easier to design and to explain to players.

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
• 16 lines of example code with 5 checks that pass
• How your AI shows you that it works

Say this to your AI

Use the Spielerando entry "Make days long in summer and short in winter, with dawn and dusk to match" (read_entry survival-season-changes-day-length) 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