| Values for Old Faithful Area | 1933-08-17 |
|---|---|
| Astronomical Twilight Begin | 03:36 |
| Nautical Twilight Begin | 04:18 |
| Civil Twilight Begin | 04:56 |
| Sunrise | 05:28 |
| Sunset | 19:26 |
| Civil Twilight End | 19:57 |
| Nautical Twilight End | 20:36 |
| Astronomical Twilight End | 21:18 |
| Moon Illumination | 14.64% |