| Values for Old Faithful Area | 2013-03-31 |
|---|---|
| Astronomical Twilight Begin | 05:24 |
| Nautical Twilight Begin | 06:00 |
| Civil Twilight Begin | 06:35 |
| Sunrise | 07:05 |
| Sunset | 19:49 |
| Civil Twilight End | 20:18 |
| Nautical Twilight End | 20:53 |
| Astronomical Twilight End | 21:30 |
| Moon Illumination | 81.44% |