Glorious in how much it would shatter all of their perceptions of her and her powers. I think seeing an alicorn, a very powerful magical pony, having to pull something like an earth pony would be strange to them.
Also, why would the season matter? It takes the same amount of time for the sun to come up past the horizon every day of the year, even if it doesn't stay up as long. (Also, not entirely certain were you got October from, but whatever)
Well I heard in October the nights last longer. And that is true! What would also freak everypony out is that in the Everfree forest the sun and also moves by themselves. Probably gives Celestia and Luna a break.
I love the metaphor present here. It also does well as a joke. The artwork is incredible as well, full of really neat, stylistic brush strokes that make this entire pic look like it was made by arranging colored pieces of straw on a VERY large flat surface. Nice work!