| Values for Old Faithful Area | 1975-10-31 |
|---|---|
| Astronomical Twilight Begin | 05:20 |
| Nautical Twilight Begin | 05:54 |
| Civil Twilight Begin | 06:28 |
| Sunrise | 06:58 |
| Sunset | 17:14 |
| Civil Twilight End | 17:45 |
| Nautical Twilight End | 18:19 |
| Astronomical Twilight End | 18:53 |
| Moon Illumination | 14.87% |