| Values for Old Faithful Area | 1931-09-02 |
|---|---|
| Astronomical Twilight Begin | 04:02 |
| Nautical Twilight Begin | 04:40 |
| Civil Twilight Begin | 05:16 |
| Sunrise | 05:46 |
| Sunset | 18:59 |
| Civil Twilight End | 19:29 |
| Nautical Twilight End | 20:05 |
| Astronomical Twilight End | 20:43 |
| Moon Illumination | 77.77% |