| Values for Old Faithful Area | 1978-08-01 |
|---|---|
| Astronomical Twilight Begin | 04:06 |
| Nautical Twilight Begin | 04:55 |
| Civil Twilight Begin | 05:36 |
| Sunrise | 06:10 |
| Sunset | 20:49 |
| Civil Twilight End | 21:22 |
| Nautical Twilight End | 22:04 |
| Astronomical Twilight End | 22:52 |
| Moon Illumination | 6.97% |