| Values for Old Faithful Area | 1931-08-25 |
|---|---|
| Astronomical Twilight Begin | 03:49 |
| Nautical Twilight Begin | 04:29 |
| Civil Twilight Begin | 05:06 |
| Sunrise | 05:36 |
| Sunset | 19:13 |
| Civil Twilight End | 19:44 |
| Nautical Twilight End | 20:21 |
| Astronomical Twilight End | 21:01 |
| Moon Illumination | 92.35% |