By using Daylight Hours (daylighthours.app) you agree to these terms. They are intentionally short and written in plain language. If you do not agree with them, please do not use the site.
These terms were last updated on 24 June 2026.
Daylight Hours is a free service that calculates and displays sunrise, sunset, day length, twilight, and moon information for locations around the world. It is provided for general information, education and curiosity.
All times are computed astronomically using the SunCalc library, based on the coordinates and date you provide. While these calculations are accurate to the minute for an ideal, flat horizon, the figures are provided "as is" and without warranty of any kind. Real-world conditions — terrain, tall obstacles, weather and atmospheric refraction — can shift the times you actually observe.
Do not rely on this site for any safety-critical, navigational, aviation, maritime, legal or commercial purpose. For such uses, consult an official source. We make no guarantee that the service will be uninterrupted, error-free or available at any particular time.
You may use the site freely for personal and informational purposes. You agree not to misuse the service, attempt to disrupt it, or use automated means to place an unreasonable load on it.
The design, text and original content of the site are the property of the site's operators. The underlying astronomical calculations rely on open-source software, which remains the property of its respective authors. You are welcome to link to the site.
To the fullest extent permitted by law, the operators of Daylight Hours shall not be liable for any loss or damage arising from your use of, or reliance on, the information provided by the site.
We may update these terms from time to time. Continued use of the site after changes means you accept the updated terms. The date at the top of this page shows when they were last revised.
Questions about these terms? Please use our contact page.