| Values for Old Faithful Area | 1997-06-01 |
|---|---|
| Astronomical Twilight Begin | 03:20 |
| Nautical Twilight Begin | 04:19 |
| Civil Twilight Begin | 05:05 |
| Sunrise | 05:41 |
| Sunset | 21:00 |
| Civil Twilight End | 21:36 |
| Nautical Twilight End | 22:23 |
| Astronomical Twilight End | 23:21 |
| Moon Illumination | 19.01% |