| Values for Old Faithful Area | 1991-07-03 |
|---|---|
| Astronomical Twilight Begin | 03:18 |
| Nautical Twilight Begin | 04:19 |
| Civil Twilight Begin | 05:07 |
| Sunrise | 05:43 |
| Sunset | 21:11 |
| Civil Twilight End | 21:47 |
| Nautical Twilight End | 22:35 |
| Astronomical Twilight End | 23:36 |
| Moon Illumination | 68.82% |