Sunrise Calculator — AI-readable summary
This site is a static HTML sunrise and sunset calculator. Each page shows sunrise time, sunset time, golden hour (civil dawn to sunrise, sunset to civil dusk), day length, and solar noon. Times are computed in the visitor's browser for the current date using a NOAA-style sunrise zenith of 90.833 degrees.
What the site provides
- Sunrise and sunset times for many cities
- Golden hour windows: civil dawn, sunrise, sunset, civil dusk
- Day length and solar noon
- A 3D globe home experience on index.html (optional; city pages share the same calculator)
How city pages are named
City pages use the pattern sunrise-{slug}.html, for example sunrise-cape-town.html for Cape Town. Slugs are lowercase with hyphens.
Golden hour page
golden-hour.html focuses on civil dawn, sunrise, sunset, and civil dusk for a chosen city, without the globe.
Example cities
- Johannesburg — sunrise-johannesburg.html
- Cape Town — sunrise-cape-town.html
- London — sunrise-london.html
- New York — sunrise-new-york.html
- Tokyo — sunrise-tokyo.html
- Sydney — sunrise-sydney.html
- São Paulo — sunrise-sao-paulo.html
- Reykjavík — sunrise-reykjavik.html