| Values for Old Faithful Area | 1975-10-28 |
|---|---|
| Astronomical Twilight Begin | 05:17 |
| Nautical Twilight Begin | 05:50 |
| Civil Twilight Begin | 06:25 |
| Sunrise | 06:54 |
| Sunset | 17:19 |
| Civil Twilight End | 17:49 |
| Nautical Twilight End | 18:23 |
| Astronomical Twilight End | 18:57 |
| Moon Illumination | 45.83% |