| Values for Old Faithful Area | 1971-10-13 |
|---|---|
| Astronomical Twilight Begin | 05:58 |
| Nautical Twilight Begin | 06:32 |
| Civil Twilight Begin | 07:06 |
| Sunrise | 07:35 |
| Sunset | 18:43 |
| Civil Twilight End | 19:12 |
| Nautical Twilight End | 19:46 |
| Astronomical Twilight End | 20:20 |
| Moon Illumination | 30.27% |