| Values for Old Faithful Area | 1964-07-17 |
|---|---|
| Astronomical Twilight Begin | 02:39 |
| Nautical Twilight Begin | 03:34 |
| Civil Twilight Begin | 04:19 |
| Sunrise | 04:54 |
| Sunset | 20:03 |
| Civil Twilight End | 20:38 |
| Nautical Twilight End | 21:24 |
| Astronomical Twilight End | 22:19 |
| Moon Illumination | 57.78% |