Annual Twilights
Civil · Nautical · Astronomical
Civil · Nautical · Astronomical
This chart shows, for a given place and year, what time it gets dark — and how dark. It distinguishes civil, nautical, and astronomical twilight, not just "sunrise/sunset", so you know precisely when the sky is dark enough to observe.
Click the map, drag the marker, type a city name into the search field, enter coordinates, or use "My location". Everything updates instantly.
The vertical axis is centred on night-time (midnight in the middle, noon at the top and bottom) — this lets you see a whole night in one continuous piece. Colours go from light blue (daytime) to black (full night), each one toggleable via the checkboxes above the chart. The red line marks the day shown in the table: drag it, or use the ◀ ▶ arrows.
Simple: the essentials, plus the night quality gauge (stars).
Complete: adds the Moon/planets table (rise, set, magnitude, paths to show on the chart).
Pro: adds precise sizes and altitudes, Saturn's ring tilt, and the ecliptic band (where the bodies sit in the sky at a given hour).
A star rating combining night duration, the Moon (phase and altitude), the weather, and soon light pollution — each weighing more or less depending on how much it actually matters. Hover the ⓘ icon next to the rating for the exact figures.
Click the map or drag the marker to update the chart instantly. Times use the Europe/Paris timezone · NOAA algorithm · accuracy ≈ 1 min.
💡 Drag the red line (or anywhere on the chart) to see the position of the bodies on another date.
| Evening | Morning | Timezone | Duration |
|---|