Dynamic Day & Night System

Bring a complete, gameplay-ready time system to your Unreal Engine project.

Dynamic Day & Night System provides a reusable Blueprint-based framework for managing in-game time, calendar progression, day/night transitions, seasonal lighting, sky color changes, resting, time fast-forwarding, and gameplay-facing time information.

Instead of relying on a simple sun rotation system, the system connects game time, calendar state, seasons, lighting, sky appearance, and gameplay interactions into one configurable manager.

Key Features

Complete Game Calendar

• Configurable date structure

• Minute, hour, day, month and year progression

• Configurable days per month

• Leap-year support

• Custom game-calendar friendly design

• No dependency on real-world year numbering

Dynamic Day & Night Cycle

• Smooth visual time progression

• Automatic daytime/nighttime detection

• Sun and moon rotation

• Independent day/night lighting

• Configurable sky-light intensity

• Sunrise and sunset events

Season System

• Winter

• Spring

• Summer

• Autumn

• Configurable seasonal sun colors

• Designed for future weather-system expansion

Dynamic Sky

• Horizon color curve

• Zenith color curve

• Smooth color transitions throughout the day

• Dynamic Material Instance support

Rest & Wake-Up System

• Rest until a selected hour

• Camera fade transition

• Sleep transition UI

• Automatic time fast-forward

• Automatic wake-up

• Rest across midnight/calendar boundaries

Time Fast Forward

• Accelerated time progression

• Configurable time multiplier

• Automatic detection of target wake-up time

• Automatic restoration of normal time progression

• Restores lighting and camera state after completion

Blueprint Integration

• GetCurrentWorldState

• GetFormattedClockTime

• GetFormattedDateAndSeason

• IsADay

• IsANight

• RestUntilHour

• OnSunrise

• OnSunset

• OnTimeUpdated

Designed for Expansion

The system is intentionally structured as a foundation for larger environmental systems.

The current season architecture can be expanded into dynamic weather systems including:

• Rain

• Snow

• Fog

• Wind

• Atmospheric changes

• Weather-driven lighting

• Ambient effects

• Seasonal weather patterns

The core time and calendar system does not need to be replaced when these features are added.