| Values for Old Faithful Area | 1975-03-17 |
|---|---|
| Astronomical Twilight Begin | 05:55 |
| Nautical Twilight Begin | 06:29 |
| Civil Twilight Begin | 07:03 |
| Sunrise | 07:32 |
| Sunset | 19:31 |
| Civil Twilight End | 20:00 |
| Nautical Twilight End | 20:33 |
| Astronomical Twilight End | 21:08 |
| Moon Illumination | 16.17% |