Is anyone else completely drained by Friday?

IDK what to do guys, or if this is me just discovering how I work optimally, but by Friday afternoons my brain is completely fried.

It's honestly depressing, but not sure what else to do to "energize" myself. It's just that after 4 focused days of work, I need time to decompress. My decision making skills are fatigued and I need a break. Anyone else? Should we have 4 day work weeks?