| Values for Old Faithful Area | 1981-08-14 |
|---|---|
| Astronomical Twilight Begin | 04:31 |
| Nautical Twilight Begin | 05:14 |
| Civil Twilight Begin | 05:53 |
| Sunrise | 06:25 |
| Sunset | 20:30 |
| Civil Twilight End | 21:02 |
| Nautical Twilight End | 21:41 |
| Astronomical Twilight End | 22:24 |
| Moon Illumination | 97.65% |