| Values for Old Faithful Area | 1976-10-20 |
|---|---|
| Astronomical Twilight Begin | 06:08 |
| Nautical Twilight Begin | 06:42 |
| Civil Twilight Begin | 07:15 |
| Sunrise | 07:45 |
| Sunset | 18:30 |
| Civil Twilight End | 19:00 |
| Nautical Twilight End | 19:33 |
| Astronomical Twilight End | 20:07 |
| Moon Illumination | 12.51% |