| Values for Old Faithful Area | 1988-08-04 |
|---|---|
| Astronomical Twilight Begin | 04:13 |
| Nautical Twilight Begin | 05:00 |
| Civil Twilight Begin | 05:41 |
| Sunrise | 06:14 |
| Sunset | 20:44 |
| Civil Twilight End | 21:17 |
| Nautical Twilight End | 21:58 |
| Astronomical Twilight End | 22:44 |
| Moon Illumination | 55.65% |