| Geyser | 1996-03-21 |
|---|---|
| Grand | 1239 |
| Values for Old Faithful Area | 1996-03-21 |
|---|---|
| Astronomical Twilight Begin | 04:45 |
| Nautical Twilight Begin | 05:20 |
| Civil Twilight Begin | 05:54 |
| Sunrise | 06:23 |
| Sunset | 18:37 |
| Civil Twilight End | 19:06 |
| Nautical Twilight End | 19:40 |
| Astronomical Twilight End | 20:15 |
| Moon Illumination | 4.18% |