Funny how tiredness manifests itself differently in different people.
For me, it's getting up in the morning that's a problem.......when I seem to feel most tired.
The strange bit is that when I'm really tired I get a kind of second wind in the mid-evening and then can't (don't) go to bed early enough......or if I do, I lie awake and read until all hours......
.....and then I'm too tired to get up in the morning......and so develops this vicious circle.
Roll on the holidays when I can let my body clock do its thing for a couple of weeks.