| Values for Old Faithful Area | 1975-04-25 |
|---|---|
| Astronomical Twilight Begin | 04:31 |
| Nautical Twilight Begin | 05:13 |
| Civil Twilight Begin | 05:51 |
| Sunrise | 06:23 |
| Sunset | 20:19 |
| Civil Twilight End | 20:50 |
| Nautical Twilight End | 21:29 |
| Astronomical Twilight End | 22:10 |
| Moon Illumination | 99.51% |