| Values for Old Faithful Area | 1977-05-12 |
|---|---|
| Astronomical Twilight Begin | 03:54 |
| Nautical Twilight Begin | 04:43 |
| Civil Twilight Begin | 05:25 |
| Sunrise | 05:58 |
| Sunset | 20:40 |
| Civil Twilight End | 21:13 |
| Nautical Twilight End | 21:55 |
| Astronomical Twilight End | 22:44 |
| Moon Illumination | 29.17% |