Know exactly where the light will be — and the date it lines up.
Sun, moon and Milky Way on the map for any place and moment. Golden hour, blue hour, the real horizon over the ridge, the tide at sunset, eclipses to the second. Then the part nobody else does: search the year for the dates when everything you want happens at once.
What it does
Sun & moon on the map
Rise and set lines from your pin, a light bar for the whole day, timeline scrubber, second pin with distance and bearing, times in the pin's own timezone.
Find dates Pro
"Full moon rising within 30 minutes of sunset, over that ridge, on a weekend, at low tide." Set the conditions, search the year, click a date to plan it.
Eclipses
Every solar and lunar eclipse visible from your spot with local contact times, a simulator that shows the discs the way your viewfinder will, and the path of totality on the map.
Milky Way & meteors
The galactic core and the arch drawn on the map when the sky is dark, moonless core windows, and every major shower's peak for your location.
Terrain & horizon Pro
Trace the real skyline 30 km around the pin and see when the sun and moon actually clear it — not the flat-earth sunrise.
Weather at the light Pro
Cloud by layer at each sunrise and sunset for the week, folded into the light score; and ten-year climate odds for the trips you book months out.
Tides Pro
Highs and lows at the nearest NOAA station, where the water stands at the golden hours, and tide as a search criterion.
Coming up
The next two weeks of nights worth planning around — eclipses, full moon into sunset, moonless Milky Way, meteor peaks, dark skies, aurora odds — for the pin and every saved place.
Photo → plan
Drop a photo: the map jumps to where and when it was taken, and finds when that exact light comes back.
Works offline, installs like an app
Add it to your home screen; the planner keeps working in the field without signal. Import your places from GPX, KML or CSV.
Accurate enough to trust
Positions come from the same class of theory the almanacs use (VSOP87 Sun, ELP Moon with parallax) and are checked against JPL Horizons in our test suite: the Sun within one arcsecond, the Moon within ten, moonrise within the minute, eclipse contacts within seconds. The engine runs in your browser — nothing is looked up from a table someone else made.
Free tools, no account
Pricing
Free forever for the planner and every calculator. Pro ($4.99/month or $39/year) adds the search, terrain, weather, climate, tides, unlimited synced places and export — with a 14-day trial, no card. Studio for teams. Full pricing →