| Values for Old Faithful Area | 1997-12-25 |
|---|---|
| Astronomical Twilight Begin | 06:12 |
| Nautical Twilight Begin | 06:48 |
| Civil Twilight Begin | 07:24 |
| Sunrise | 07:58 |
| Sunset | 16:48 |
| Civil Twilight End | 17:22 |
| Nautical Twilight End | 17:59 |
| Astronomical Twilight End | 18:34 |
| Moon Illumination | 19.88% |