| Values for Old Faithful Area | 1979-07-29 |
|---|---|
| Astronomical Twilight Begin | 04:00 |
| Nautical Twilight Begin | 04:50 |
| Civil Twilight Begin | 05:32 |
| Sunrise | 06:06 |
| Sunset | 20:52 |
| Civil Twilight End | 21:26 |
| Nautical Twilight End | 22:09 |
| Astronomical Twilight End | 22:58 |
| Moon Illumination | 22.47% |