Sunset and Sunrise Times API (Free) - SunriseSunset.io
Free API to get sunrise and sunset times for any location using coordinates. Returned JSON results include all types of sun events.
Categories:
SunriseSunset.io API provides free access to sunrise, sunset, dawn, dusk, golden hour, and other solar event times for any location worldwide using latitude and longitude coordinates.
🚀 Overview
SunriseSunset.io offers a user-friendly web tool and a robust free API to retrieve accurate sunrise, sunset, and related astronomical times for any spot on Earth. Simply provide latitude/longitude (or use the web interface for cities), and get detailed JSON data—no API key or registration needed.
It solves the challenge of accessing precise solar data without building complex astronomical calculators or paying for premium services. Developers can integrate it effortlessly into apps for weather displays, photography planning, smart lighting, or automation.
Targeted at developers, indie makers, photographers, travelers, and agriculture apps, it was built by Andy Feliciotti, a WordPress developer and photographer from Washington DC, to freely share this utility with attribution. Inspired by real-world needs like optimal photo shoots at golden hour.
✨ Key Features
- Detailed solar events including sunrise, sunset, first_light, last_light, dawn, dusk, solar_noon, golden_hour, and day_length.
- Flexible parameters: date/date range (up to 365 days), timezone, time_format (12/24/military/unix/ISO), formatted output.
- JSON/JSONP support, edge case handling (e.g., polar regions), serves millions of requests monthly.
- Optional: Nautical twilight and other enhancements from recent changelog.
🛠 Tech Stack
- Frontend: JavaScript (usage examples on CodePen by creator)
- Backend: Custom (astronomical calculations, details not disclosed)
- Database: None (on-the-fly computation)
- Auth: None
- Hosting: Cloud-based (status: https://status.sunrisesunset.io/)
👥 Who Is This For?
This project is useful for:
- Developers who want to integrate sun time data into apps without astronomical libraries
- Teams looking for free, high-volume API for IoT, weather, or location services
- Indie makers building photography tools, travel apps, or home automation
📸 Screenshots / Demo
- Live demo: https://sunrisesunset.io/
- GitHub: https://github.com/someguy9
🔥 Project Status
- 🟢 Actively building
Last updated: 2026-03-24
❓ FAQ
Is this project free?
Yes — Free for personal and commercial use with required attribution (link to https://sunrisesunset.io/). (Explain briefly.)
Is the source code available?
No — explain why: Closed-source project by individual developer Andy Feliciotti.
Can I contribute?
Share feedback on Twitter @SunriseSunsetio, donate via BuyMeACoffee (https://www.buymeacoffee.com/someguy), or suggest features.
📬 Contact & Links
- Website: https://sunrisesunset.io/
- GitHub: https://github.com/someguy9
- Twitter/X: https://x.com/SunriseSunsetio
- Email: andy@drawne.com
Built with ❤️ and kept warm on WarmIndex.
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