| Values for Old Faithful Area | 1975-04-14 |
|---|---|
| Astronomical Twilight Begin | 04:55 |
| Nautical Twilight Begin | 05:34 |
| Civil Twilight Begin | 06:11 |
| Sunrise | 06:41 |
| Sunset | 20:05 |
| Civil Twilight End | 20:36 |
| Nautical Twilight End | 21:12 |
| Astronomical Twilight End | 21:51 |
| Moon Illumination | 6.4% |