Crashing Fatigue Do People With Chronic Fatigue Syndrome Often Find That They Crash On A Certain Day Of The Week?

Do people with Chronic Fatigue Syndrome often find that they crash on a certain day of the week? - crashing fatigue

My mother said, it depends on Sundays. But I wonder why no coincidence, since Saturday, he played the whole week. But I wanted to see whether this is realistic, or if there is a reason.