| Values for Old Faithful Area | 1971-09-29 |
|---|---|
| Astronomical Twilight Begin | 05:41 |
| Nautical Twilight Begin | 06:15 |
| Civil Twilight Begin | 06:49 |
| Sunrise | 07:18 |
| Sunset | 19:09 |
| Civil Twilight End | 19:38 |
| Nautical Twilight End | 20:11 |
| Astronomical Twilight End | 20:46 |
| Moon Illumination | 65.94% |