| Values for Old Faithful Area | 1977-02-18 |
|---|---|
| Astronomical Twilight Begin | 05:41 |
| Nautical Twilight Begin | 06:14 |
| Civil Twilight Begin | 06:48 |
| Sunrise | 07:18 |
| Sunset | 17:56 |
| Civil Twilight End | 18:25 |
| Nautical Twilight End | 18:59 |
| Astronomical Twilight End | 19:33 |
| Moon Illumination | 0.02% |