| Values for Old Faithful Area | 1974-12-17 |
|---|---|
| Astronomical Twilight Begin | 06:08 |
| Nautical Twilight Begin | 06:43 |
| Civil Twilight Begin | 07:20 |
| Sunrise | 07:54 |
| Sunset | 16:44 |
| Civil Twilight End | 17:18 |
| Nautical Twilight End | 17:54 |
| Astronomical Twilight End | 18:30 |
| Moon Illumination | 12.19% |