There is a special quality to the day that has been cloudy and ends with a last-minute parting of the clouds. The sun, of course, is low in the sky, and so those first rays are a bit disorienting.
Is it just selective memory, or does the sun set more grandly, more expansively on those days? It makes sense that it might. Banks of just-parted clouds pile in heaps on the horizon and add drama to the sun's steady slipping.
And on the ground, people who have been inside all day rush out to walk before darkness falls. The streets that were clammy and silent are suddenly peopled again. There is an unusual briskness at day's end. And a hopefulness for the morrow.