Quickly dropping orb

I'm absolutely amazed by the speed of the setting sun this week. I suspect this solar behavior is not unusual at all; what appears to be an instantaneous sunset is probably driven by my riding close to the edges of the day.

My usual habit is to be off the road well before sunset, but this week I've been pushing the edges (and yes, I really do need Daylight Savings Time to support my after-work rides!). By the time I hit the road with my bike, I had just a little over an hour to ride. Today I headed out at 4:45, and sunset was at 6:07. I was home somewhere between 10 and 15 minutes before sunset. There was still plenty of light when I rolled into my garage, but it seemed like total darkness appeared just a short time later.