| Geyser | 1974-03-31 |
|---|---|
| Congress Pool | 0000 |
| Ledge | 0000 |
| Steamboat | 0000 |
| Values for Old Faithful Area | 1974-03-31 |
|---|---|
| Astronomical Twilight Begin | 05:25 |
| Nautical Twilight Begin | 06:01 |
| Civil Twilight Begin | 06:36 |
| Sunrise | 07:06 |
| Sunset | 19:48 |
| Civil Twilight End | 20:18 |
| Nautical Twilight End | 20:53 |
| Astronomical Twilight End | 21:29 |
| Moon Illumination | 52.17% |