| Values for Old Faithful Area | 1976-10-18 |
|---|---|
| Astronomical Twilight Begin | 06:06 |
| Nautical Twilight Begin | 06:39 |
| Civil Twilight Begin | 07:13 |
| Sunrise | 07:42 |
| Sunset | 18:33 |
| Civil Twilight End | 19:03 |
| Nautical Twilight End | 19:37 |
| Astronomical Twilight End | 20:10 |
| Moon Illumination | 30.71% |