| Values for Old Faithful Area | 1976-10-15 |
|---|---|
| Astronomical Twilight Begin | 06:02 |
| Nautical Twilight Begin | 06:36 |
| Civil Twilight Begin | 07:09 |
| Sunrise | 07:39 |
| Sunset | 18:38 |
| Civil Twilight End | 19:08 |
| Nautical Twilight End | 19:41 |
| Astronomical Twilight End | 20:15 |
| Moon Illumination | 61.12% |