| Geyser | 1931-07-01 |
|---|---|
| Pinto | 0825 |
| Values for Old Faithful Area | 1931-07-01 |
|---|---|
| Astronomical Twilight Begin | 02:15 |
| Nautical Twilight Begin | 03:17 |
| Civil Twilight Begin | 04:05 |
| Sunrise | 04:41 |
| Sunset | 20:11 |
| Civil Twilight End | 20:48 |
| Nautical Twilight End | 21:36 |
| Astronomical Twilight End | 22:38 |
| Moon Illumination | 98.26% |