| Values for Old Faithful Area | 1997-04-22 |
|---|---|
| Astronomical Twilight Begin | 04:36 |
| Nautical Twilight Begin | 05:17 |
| Civil Twilight Begin | 05:55 |
| Sunrise | 06:26 |
| Sunset | 20:16 |
| Civil Twilight End | 20:47 |
| Nautical Twilight End | 21:25 |
| Astronomical Twilight End | 22:06 |
| Moon Illumination | 99.63% |