| Values for Old Faithful Area | 1976-05-15 |
|---|---|
| Astronomical Twilight Begin | 03:48 |
| Nautical Twilight Begin | 04:38 |
| Civil Twilight Begin | 05:21 |
| Sunrise | 05:55 |
| Sunset | 20:44 |
| Civil Twilight End | 21:17 |
| Nautical Twilight End | 22:00 |
| Astronomical Twilight End | 22:50 |
| Moon Illumination | 97.07% |