| Values for Old Faithful Area | 1931-08-14 |
|---|---|
| Astronomical Twilight Begin | 03:30 |
| Nautical Twilight Begin | 04:13 |
| Civil Twilight Begin | 04:52 |
| Sunrise | 05:24 |
| Sunset | 19:31 |
| Civil Twilight End | 20:03 |
| Nautical Twilight End | 20:42 |
| Astronomical Twilight End | 21:25 |
| Moon Illumination | 0.27% |