| Values for Old Faithful Area | 1975-04-15 |
|---|---|
| Astronomical Twilight Begin | 04:53 |
| Nautical Twilight Begin | 05:32 |
| Civil Twilight Begin | 06:09 |
| Sunrise | 06:39 |
| Sunset | 20:07 |
| Civil Twilight End | 20:37 |
| Nautical Twilight End | 21:14 |
| Astronomical Twilight End | 21:53 |
| Moon Illumination | 12.38% |