| Values for Old Faithful Area | 1969-08-20 |
|---|---|
| Astronomical Twilight Begin | 04:42 |
| Nautical Twilight Begin | 05:23 |
| Civil Twilight Begin | 06:01 |
| Sunrise | 06:32 |
| Sunset | 20:21 |
| Civil Twilight End | 20:52 |
| Nautical Twilight End | 21:29 |
| Astronomical Twilight End | 22:11 |
| Moon Illumination | 43.64% |