| Geyser | 1964-05-31 |
|---|---|
| Harding | 1800 |
| Values for Old Faithful Area | 1964-05-31 |
|---|---|
| Astronomical Twilight Begin | 02:22 |
| Nautical Twilight Begin | 03:19 |
| Civil Twilight Begin | 04:06 |
| Sunrise | 04:41 |
| Sunset | 20:00 |
| Civil Twilight End | 20:35 |
| Nautical Twilight End | 21:22 |
| Astronomical Twilight End | 22:19 |
| Moon Illumination | 79.71% |