This is proof that you have Martian DNA, on Mars a day lasts 24 hrs 35 minutes, millions of years of evolution on that daylength means that approximately every 36 days your biological clock skips a day. Or every 18 days, your biological clock is fully inverted from Martian "Normal"

This is why you feel overwhelmingly tired on an 18 day cycle, your body is fighting millions of years of evolution to adhere to the accursed Earth day. The only solution is to go back to Mars, then we will feel better.

(This is my coping mechanism)