Considering that I did all that flying around the world, and also back and forth across the U.S.A. for so many years, I'm rather appalled at my inability to adjust to a slight time change of one hour.
Yes, it's that annoying clocks-go-back-an-hour time of the year. It also is the precursor of winter, but I can deal with that in a place that has 300 days of sunshine a year.
I used to come off flights and go straight to the office the next day and stamp out a few fires. Granted I used to feel a little groggy, but I was quite functionable. But this stupid one hour stuff has me awake even earlier than most old men; and I find myself slinking out of the bedroom well before 6, leaving S.W.M.B.O. still sleeping. Then the computer beckons earlier than usual. No wonder I'm exhausted by 9:00 p.m.!