| Values for Old Faithful Area | 1973-03-18 |
|---|---|
| Astronomical Twilight Begin | 04:52 |
| Nautical Twilight Begin | 05:26 |
| Civil Twilight Begin | 06:00 |
| Sunrise | 06:29 |
| Sunset | 18:33 |
| Civil Twilight End | 19:01 |
| Nautical Twilight End | 19:35 |
| Astronomical Twilight End | 20:10 |
| Moon Illumination | 99.49% |