The vibrant oranges and yellows in Olive Trees with Yellow Sky and Sun suggest the fall season.... Warren Keith Wright came to realize that the ...painting represented 2 periods of time. The late-afternoon sun lies due west above the mountains. The shadows, though, slant from the left, or the southwest, where they would fall in autumn. Not only is the painting out of sync with time, it is also out of sync with the season. It ...." https://en.wikipedia.org/wiki/Olive_Trees_%28Van_Gogh_series