Explore day and night
See light and shadow across the world, change the date and time, or return instantly to now.
Sun map and Moon phases
Follow sunlight across the Earth.
Explore where it is day or night, move through dates and times, study the Moon, and find the Sun and Moon in your local sky.
- Interactive day and night map
- Detailed Moon phases
- Compass and Zenith views
The sky, made clear
Three ways to understand the moment.
From the whole Earth to the sky above you, Night and Day presents useful solar and lunar information in a focused, visual interface.
Understand the Moon
Check the current phase, illumination, lunar age, distance from Earth, and upcoming major phases.
Locate Sun and Moon
Use Compass and Zenith views to examine direction, azimuth, and altitude for another moment in time.
Travel through time
See how the sky changes.
Move across the day or the year to compare sunlight, Moon phases, and celestial positions. Return to the present with a single tap.
Simple and private
No tracking on this website.
The app uses your current location to orient the local sky in the Sun and Moon section. Its astronomical data and visualizations are provided for informational use.
This website uses no cookies, analytics, advertising pixels, or tracking scripts. It contains only local HTML, CSS, and image files.