| Values for Old Faithful Area | 1976-08-28 |
|---|---|
| Astronomical Twilight Begin | 04:56 |
| Nautical Twilight Begin | 05:35 |
| Civil Twilight Begin | 06:11 |
| Sunrise | 06:41 |
| Sunset | 20:06 |
| Civil Twilight End | 20:37 |
| Nautical Twilight End | 21:13 |
| Astronomical Twilight End | 21:52 |
| Moon Illumination | 10.55% |