| Values for Old Faithful Area | 1976-07-23 |
|---|---|
| Astronomical Twilight Begin | 03:50 |
| Nautical Twilight Begin | 04:42 |
| Civil Twilight Begin | 05:26 |
| Sunrise | 06:00 |
| Sunset | 20:58 |
| Civil Twilight End | 21:32 |
| Nautical Twilight End | 22:16 |
| Astronomical Twilight End | 23:08 |
| Moon Illumination | 15.32% |