| Values for Old Faithful Area | 1991-09-14 |
|---|---|
| Astronomical Twilight Begin | 05:21 |
| Nautical Twilight Begin | 05:57 |
| Civil Twilight Begin | 06:31 |
| Sunrise | 07:00 |
| Sunset | 19:36 |
| Civil Twilight End | 20:06 |
| Nautical Twilight End | 20:40 |
| Astronomical Twilight End | 21:16 |
| Moon Illumination | 34.12% |