| Values for Old Faithful Area | 1975-05-16 |
|---|---|
| Astronomical Twilight Begin | 03:47 |
| Nautical Twilight Begin | 04:38 |
| Civil Twilight Begin | 05:21 |
| Sunrise | 05:54 |
| Sunset | 20:44 |
| Civil Twilight End | 21:18 |
| Nautical Twilight End | 22:01 |
| Astronomical Twilight End | 22:51 |
| Moon Illumination | 26.25% |