| Values for Old Faithful Area | 1994-04-21 |
|---|---|
| Astronomical Twilight Begin | 04:39 |
| Nautical Twilight Begin | 05:20 |
| Civil Twilight Begin | 05:58 |
| Sunrise | 06:28 |
| Sunset | 20:15 |
| Civil Twilight End | 20:45 |
| Nautical Twilight End | 21:23 |
| Astronomical Twilight End | 22:04 |
| Moon Illumination | 72.49% |