| Values for Old Faithful Area | 1993-10-31 |
|---|---|
| Astronomical Twilight Begin | 05:21 |
| Nautical Twilight Begin | 05:55 |
| Civil Twilight Begin | 06:29 |
| Sunrise | 06:59 |
| Sunset | 17:14 |
| Civil Twilight End | 17:44 |
| Nautical Twilight End | 18:18 |
| Astronomical Twilight End | 18:52 |
| Moon Illumination | 99.53% |