| Values for Old Faithful Area | 1973-03-23 |
|---|---|
| Astronomical Twilight Begin | 04:41 |
| Nautical Twilight Begin | 05:17 |
| Civil Twilight Begin | 05:51 |
| Sunrise | 06:20 |
| Sunset | 18:39 |
| Civil Twilight End | 19:08 |
| Nautical Twilight End | 19:42 |
| Astronomical Twilight End | 20:17 |
| Moon Illumination | 82.3% |