| Values for Old Faithful Area | 1977-03-16 |
|---|---|
| Astronomical Twilight Begin | 04:55 |
| Nautical Twilight Begin | 05:30 |
| Civil Twilight Begin | 06:04 |
| Sunrise | 06:33 |
| Sunset | 18:30 |
| Civil Twilight End | 18:59 |
| Nautical Twilight End | 19:33 |
| Astronomical Twilight End | 20:07 |
| Moon Illumination | 12.67% |