| Values for Old Faithful Area | 1931-08-24 |
|---|---|
| Astronomical Twilight Begin | 03:47 |
| Nautical Twilight Begin | 04:27 |
| Civil Twilight Begin | 05:05 |
| Sunrise | 05:35 |
| Sunset | 19:15 |
| Civil Twilight End | 19:46 |
| Nautical Twilight End | 20:23 |
| Astronomical Twilight End | 21:03 |
| Moon Illumination | 86.16% |