| Values for Old Faithful Area | 1977-05-29 |
|---|---|
| Astronomical Twilight Begin | 03:25 |
| Nautical Twilight Begin | 04:21 |
| Civil Twilight Begin | 05:07 |
| Sunrise | 05:43 |
| Sunset | 20:58 |
| Civil Twilight End | 21:33 |
| Nautical Twilight End | 22:19 |
| Astronomical Twilight End | 23:16 |
| Moon Illumination | 81.82% |