| Values for Old Faithful Area | 1977-07-24 |
|---|---|
| Astronomical Twilight Begin | 03:52 |
| Nautical Twilight Begin | 04:43 |
| Civil Twilight Begin | 05:27 |
| Sunrise | 06:01 |
| Sunset | 20:57 |
| Civil Twilight End | 21:31 |
| Nautical Twilight End | 22:15 |
| Astronomical Twilight End | 23:07 |
| Moon Illumination | 54.97% |