| Values for Old Faithful Area | 1973-04-12 |
|---|---|
| Astronomical Twilight Begin | 03:59 |
| Nautical Twilight Begin | 04:37 |
| Civil Twilight Begin | 05:13 |
| Sunrise | 05:44 |
| Sunset | 19:04 |
| Civil Twilight End | 19:34 |
| Nautical Twilight End | 20:10 |
| Astronomical Twilight End | 20:48 |
| Moon Illumination | 72.55% |