| Values for Old Faithful Area | 1978-03-25 |
|---|---|
| Astronomical Twilight Begin | 04:38 |
| Nautical Twilight Begin | 05:13 |
| Civil Twilight Begin | 05:48 |
| Sunrise | 06:17 |
| Sunset | 18:41 |
| Civil Twilight End | 19:10 |
| Nautical Twilight End | 19:44 |
| Astronomical Twilight End | 20:20 |
| Moon Illumination | 99.57% |