| Values for Old Faithful Area | 1976-09-04 |
|---|---|
| Astronomical Twilight Begin | 05:07 |
| Nautical Twilight Begin | 05:44 |
| Civil Twilight Begin | 06:20 |
| Sunrise | 06:49 |
| Sunset | 19:54 |
| Civil Twilight End | 20:23 |
| Nautical Twilight End | 20:59 |
| Astronomical Twilight End | 21:37 |
| Moon Illumination | 81.58% |