| Values for Old Faithful Area | 1971-09-07 |
|---|---|
| Astronomical Twilight Begin | 05:10 |
| Nautical Twilight Begin | 05:47 |
| Civil Twilight Begin | 06:22 |
| Sunrise | 06:52 |
| Sunset | 19:50 |
| Civil Twilight End | 20:19 |
| Nautical Twilight End | 20:55 |
| Astronomical Twilight End | 21:32 |
| Moon Illumination | 93.49% |