Adaptive Lighting custom component for Home Assistant

Reduces eye strain by adjusting screen gamma based on the current time

HA Lovelace card for control of scheduler entities

A Swift micro library for generating Sunrise and Sunset times.

Kelvin - The hue bot

Python calculations for the position of the sun and moon.

A command line application written in Rust capable of delaying execution of other programs for time periods relative to sunrise and sunset.

Go package for calculating the sunrise and sunset times for a given location

SunKit is a Swift library which uses math and trigonometry to compute several information about the Sun.

Set macOS dark mode and Alfred dark theme at sunset

Astro: Go Library for Astronomy Algorithms - Chinese Lunar Calendar Conversion, Planet Positions, Sunrise/Sunset, Moon Rise/Set in Go (天文算法 Go 库：公农历转换、行星位置、日出日落、月升月落)

Night and day regions on Earth

KosherJava Zmanim API / Library

Sunrise, sunset, twilight, noon, dawn and dusk time calculation for given coordinates with zero dependencies.

🌅 Go package that provides the sunrise and sunset equation

A Python port of suncalc.js for calculating sun position and sunlight phases

Arduino library to calculate the times of sunrise, sunset, solar noon, twilight, the solar position, and more.

🌅 A macOS app that sets your wallpaper based on sunrise and sunset.

Positional is a simple Android app for displaying information about your current location.

☀ Sync Philips Hue & Home Assistant lights to your natural rhythm—with solar-aware schedules and smooth transitions.