This package contains art, text, or software code produced using generative AI.
The default clock face artwork included in this module was created using generative AI. Generative AI tools were utilized for grammar checking, code linting, and minor debugging assistance. All core logic, features, and creative content were manually developed and reviewed by the author.
Phil's Day&Night Cycle - v4.7.0
Bring your world to life with an immersive Clock, Calendar, Weather, and Lighting System for Foundry VTT.
Phil's Day&Night Cycle turns your game world into a living, breathing experience. It combines a beautiful clock and calendar interface with a powerful simulation engine for time, weather, moonlight, and dynamic scene darkness.
New in v4.7.x: Built-in Simple Calendar Import
Migrating from Simple Calendar is now easier than ever. Phil's Day&Night Cycle includes a built-in import function that converts your active Simple Calendar setup into a PDNC custom calendar and imports compatible notes and events.
The importer has been further refined and now:
- reliably transfers imported events and notes
- places imported entries on the correct dates
- preserves GM-only notes and permission visibility correctly
If you're still using Simple Calendar and looking for an actively maintained alternative, this is a great time to switch.

Key Features
Immersive Clock
A beautiful, localized widget that tracks day phases and stays synchronized with Foundry's World Time.
Integrated Calendar
No external calendar module required. Manage campaign dates, public events, and secret GM notes directly inside the module.
Simple Calendar Import
Bring your existing setup with you. Import calendar structure, notes, and events from Simple Calendar into Phil's Day&Night Cycle.
Living Weather System
Simulates weather across many climate zones and automatically applies visual effects and atmosphere to your scenes.
Smart Lighting
Scene darkness updates dynamically based on time of day, season, weather, cloud cover, and moon phase.
Cinematic Moon
Moon phases are fully simulated and influence nighttime lighting, making full moon nights feel very different from dark new moon nights.
Dungeon Mode
Perfect for interior scenes and dungeon crawls. Quickly disable automatic global weather and lighting updates for a specific scene.
GM Tools
Includes powerful utilities like calendar management, event handling, and immersive world-control features for smooth campaign play.
Standalone and Lightweight
No complex setup and no dependency on external calendar modules. Just install it and bring your world to life.