| Values for Old Faithful Area | 2002-01-31 |
|---|---|
| Astronomical Twilight Begin | 06:02 |
| Nautical Twilight Begin | 06:36 |
| Civil Twilight Begin | 07:11 |
| Sunrise | 07:42 |
| Sunset | 17:31 |
| Civil Twilight End | 18:01 |
| Nautical Twilight End | 18:36 |
| Astronomical Twilight End | 19:10 |
| Moon Illumination | 92.06% |