Building a reliable day/night cycle usually starts simple, then gets messy fast.
You need stable time progression, smooth visual transitions, clean gameplay hooks, and something that still performs when your project grows.

That is exactly what DayNightSystem is built for.

This plugin is written in C++ for runtime performance and stability, while exposing a Blueprint-first workflow so designers can build systems without touching code.

Drop in one manager, assign your sun + fog, and you’re live.

You get:

• smooth day/night visual blending

• a global world clock

• weekday/calendar support

• event-driven Blueprint gameplay hooks

• direct Blueprint controls for setting/advancing/pausing time

And importantly: it’s practical.
No bloated framework, no forced save architecture, no unnecessary complexity.

Blueprint-First, C++ Performance

• Core logic implemented in C++ for efficient runtime behavior

• Event dispatchers for day/night/hour/minute updates so your gameplay can react cleanly

Key Features

• One global DayNightManager actor controls world time

• Smooth transitions for:

  • sun rotation

  • sun color/intensity

  • fog color/density

• Runtime controls:

  • set exact time

  • advance minutes

  • pause/resume cycle

• Calendar/weekday support:

  • start day selection

  • current weekday/day index queries

• DayNightSubscriberComponent for plug-and-play actor subscriptions

• Safe bounded stepping to reduce extreme frame-spike time jumps

• Blueprint-friendly by design, production-friendly under the hood

Ideal For

• survival and sandbox games

• RPG schedules and shop open/close logic

• farming/life sim daily loops

• horror or stealth games with day/night state shifts

• any project that needs predictable world time with minimal setup time

What’s Included

• DayNightManager actor

• DayNightSubscriberComponent

• shared day/night enums/structs/delegates

• Blueprint API for querying and controlling time