| Values for Old Faithful Area | 2001-02-21 |
|---|---|
| Astronomical Twilight Begin | 05:36 |
| Nautical Twilight Begin | 06:09 |
| Civil Twilight Begin | 06:43 |
| Sunrise | 07:13 |
| Sunset | 18:00 |
| Civil Twilight End | 18:30 |
| Nautical Twilight End | 19:03 |
| Astronomical Twilight End | 19:37 |
| Moon Illumination | 3.76% |