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Solar and lunar eclipse visibility

Find local solar eclipse contacts and inspect your horizon during lunar eclipses. Peak times, obscuration and contact altitudes, calculated on your device.

An eclipse is not visible in the same way everywhere. Solar eclipse contacts depend on the observer’s location. Lunar eclipse phases share global instants, but the Moon may be below your horizon for some or all of them. This tool keeps those two cases separate instead of presenting a global date as a promise of local visibility.

This calculator needs JavaScript to keep the calculation on your device. Your details are not submitted anywhere. The instructions, method and related guides below remain available without JavaScript.

Choose a moment

DateLocal time

IANA time zone

Use the place’s time zone, such as Europe/Warsaw or America/Sao_Paulo. Keep the recorded clock time; do not adjust for summer time yourself.

If the clock time occurred twice

One fixed download; the selected country or city is never sent in a request.

Observer latitudeObserver longitude

Place data: GeoNames geographical database,CC BY 4.0. Snapshot retrieved 27 August 2026. The cities15000 directory does not include every settlement; manual coordinates and time zones remain available.

No name, email or account is needed. Your details stay on your device. Use the clear button to remove entered details and results.

How to use this tool

Choose an observing place, a starting date and its time zone. The search covers the following five years within the supported date range. Read the solar contact list separately from the lunar contact altitudes, including any Moonrise or Moonset during an eclipse. Observer coordinates stay in the browser and are not sent to a map or geocoding provider.

How to read the result

Solar obscuration is the fraction of the Sun’s disc covered at local maximum. For a lunar eclipse, the percentage describes the area inside Earth’s umbra at global maximum; a penumbral eclipse has no umbral obscuration. Contact altitude and Moonrise or Moonset describe your local horizon opportunity, not a promise of a clear view.

Method and limits

Weather, buildings and local terrain are not modeled. Predicted contact times inherit the ephemeris and Earth-rotation model limitations, especially far into the future. Use reliable specialist observing guidance before making travel plans. Never view the Sun directly or through optical equipment without correctly rated solar protection.

The calculation uses Astronomy Engine 2.1.19 and, where applicable, the project’s offline time-scale and house geometry modules. Mathematical positions and traditional interpretation remain separate.Read the full methodology.