On Earth we are closing in on a new year but it's spring on Mars' Northern hemisphere. Lot's of North polar cap sublimation means CO2 runs abundant. As you can see plainly on the blue channel there's lots of evening clouds on Mars' volcanic region.
Also the animation was featured in Sky & Telescope events page Mars Extravaganza — Occultation and Opposition Rolled into One! - Sky & Telescope - Sky & Telescope
Good read on Martian seasons
evening on Mars' volcanic region
