| Geyser | 1931-07-22 |
|---|---|
| Valentine | 1035 |
| Values for Old Faithful Area | 1931-07-22 |
|---|---|
| Astronomical Twilight Begin | 02:46 |
| Nautical Twilight Begin | 03:39 |
| Civil Twilight Begin | 04:24 |
| Sunrise | 04:58 |
| Sunset | 20:00 |
| Civil Twilight End | 20:35 |
| Nautical Twilight End | 21:19 |
| Astronomical Twilight End | 22:12 |
| Moon Illumination | 50.87% |