The Longest Hour of the Day

I work a day job. My hours, usually, are 8am-5pm, although I do on occasion work 7am-4pm.

Now, you may think the longest hour of the day would be 4-5pm (or 3-4pm), but you would be wrong.  Based on my observations over the years, the longest hour of the day is 10-11am.

I have absolutely no idea why. But it’s true. I notice it every single workday.

Any theories out there?