As a daylight lover, and a hiker that doesn't start before the sun is up, I like to celebrate this day every year... today's sunset will be ever-so-slightly later than yesterdays, and the difference will accelerate... Nice!
(on the down side, of course, sunrises will come later and later as well until early January, but morning sun is less important to me personally).
Here's a link if anyone cares to read up on this:
http://earthsky.org/tonight/earliest...t-shortest-day