| Values for Old Faithful Area | 1977-01-29 |
|---|---|
| Astronomical Twilight Begin | 06:04 |
| Nautical Twilight Begin | 06:38 |
| Civil Twilight Begin | 07:13 |
| Sunrise | 07:44 |
| Sunset | 17:28 |
| Civil Twilight End | 17:59 |
| Nautical Twilight End | 18:34 |
| Astronomical Twilight End | 19:08 |
| Moon Illumination | 69.06% |