| Values for Old Faithful Area | 1976-10-01 |
|---|---|
| Astronomical Twilight Begin | 05:44 |
| Nautical Twilight Begin | 06:19 |
| Civil Twilight Begin | 06:52 |
| Sunrise | 07:21 |
| Sunset | 19:03 |
| Civil Twilight End | 19:32 |
| Nautical Twilight End | 20:06 |
| Astronomical Twilight End | 20:40 |
| Moon Illumination | 58.51% |