*Dawn and dusk (twilight) periods are time spans before sunrise or after sunset, respectively:
- Civil twilight is the time before sunrise and after sunset when the sun is at a maximum angle of 6 degrees under the horizon. Usually it is possible to read the paper under these twilight conditions. First stars become visible (up to magnitude 1).
- Nautical twilight is the time before/after the civil twilight when the sun is at a maximum angle of 12 degrees under the horizon. The most important stars are visible (magnitude 3) as well as the horizon. Therefore, nautical positioning using classical instruments is possible.
- Astronomical twilight is the time before/after nautical twilight when the sun is at a maximum angle of 18 degrees under the horizon. Horizon is not visible anymore, all stars become visible. After/before that twilight all stars are visible.
| Astronomical data for Friday , 09/12/2025 | ||
| Begin of astronomical twilight* | (UTC+1) | 4:00 AM |
| Begin of nautical twilight* | (UTC+1) | 4:44 AM |
| Begin of civil twilight* | (UTC+1) | 5:26 AM |
| Sunrise | (UTC+1) | 5:59 AM |
| Solar noon | (UTC+1) | 12:26 PM |
| Sunset | (UTC+1) | 6:52 PM |
| End of civil twilight* | (UTC+1) | 7:26 PM |
| End of nautical twilight* | (UTC+1) | 8:08 PM |
| End of astronomical twilight* | (UTC+1) | 8:52 PM |