Dave Johnson writes from Parkville: "When are the longest and shortest days of the year?" It's a trick question, right Dave? All solar days are approximately the same length - about 24 hours. We fine-tune with leap years and leap seconds. Today is the date with the most minutes of sunshine in the northern hemisphere. In Baltimore, the sun rose at 5:40 a.m. EDT, and sets at 8:37 p.m. That's 14 hours, 57 minutes of sunshine. This year, Dec. 22 will see the least daylight.