| Values for Old Faithful Area | 1977-02-27 |
|---|---|
| Astronomical Twilight Begin | 05:26 |
| Nautical Twilight Begin | 06:00 |
| Civil Twilight Begin | 06:34 |
| Sunrise | 07:03 |
| Sunset | 18:08 |
| Civil Twilight End | 18:37 |
| Nautical Twilight End | 19:11 |
| Astronomical Twilight End | 19:45 |
| Moon Illumination | 61.16% |