| Values for Old Faithful Area | 1971-08-25 |
|---|---|
| Astronomical Twilight Begin | 04:49 |
| Nautical Twilight Begin | 05:29 |
| Civil Twilight Begin | 06:06 |
| Sunrise | 06:37 |
| Sunset | 20:13 |
| Civil Twilight End | 20:43 |
| Nautical Twilight End | 21:21 |
| Astronomical Twilight End | 22:00 |
| Moon Illumination | 16.15% |