| Values for Old Faithful Area | 1971-10-10 |
|---|---|
| Astronomical Twilight Begin | 05:55 |
| Nautical Twilight Begin | 06:29 |
| Civil Twilight Begin | 07:02 |
| Sunrise | 07:31 |
| Sunset | 18:49 |
| Civil Twilight End | 19:18 |
| Nautical Twilight End | 19:51 |
| Astronomical Twilight End | 20:25 |
| Moon Illumination | 60.5% |