| Values for Old Faithful Area | 1975-09-25 |
|---|---|
| Astronomical Twilight Begin | 05:36 |
| Nautical Twilight Begin | 06:10 |
| Civil Twilight Begin | 06:44 |
| Sunrise | 07:13 |
| Sunset | 19:16 |
| Civil Twilight End | 19:45 |
| Nautical Twilight End | 20:19 |
| Astronomical Twilight End | 20:54 |
| Moon Illumination | 80.6% |