| Values for Old Faithful Area | 2001-02-20 |
|---|---|
| Astronomical Twilight Begin | 05:37 |
| Nautical Twilight Begin | 06:11 |
| Civil Twilight Begin | 06:45 |
| Sunrise | 07:14 |
| Sunset | 17:59 |
| Civil Twilight End | 18:28 |
| Nautical Twilight End | 19:02 |
| Astronomical Twilight End | 19:36 |
| Moon Illumination | 8.17% |