| Values for Old Faithful Area | 1973-05-13 |
|---|---|
| Astronomical Twilight Begin | 03:52 |
| Nautical Twilight Begin | 04:41 |
| Civil Twilight Begin | 05:24 |
| Sunrise | 05:57 |
| Sunset | 20:41 |
| Civil Twilight End | 21:15 |
| Nautical Twilight End | 21:57 |
| Astronomical Twilight End | 22:46 |
| Moon Illumination | 85.52% |