| Values for Old Faithful Area | 1933-07-21 |
|---|---|
| Astronomical Twilight Begin | 02:45 |
| Nautical Twilight Begin | 03:39 |
| Civil Twilight Begin | 04:23 |
| Sunrise | 04:58 |
| Sunset | 20:00 |
| Civil Twilight End | 20:35 |
| Nautical Twilight End | 21:20 |
| Astronomical Twilight End | 22:13 |
| Moon Illumination | 1.82% |