We are starting Mesechtas Moed Katan which deals with the laws of Chol Hamoed.
The sium comes out on the last day of Chol Hamoed Pesach.
Rambam holds that the prohibition of work on C. H. Is by law of the Sages
Tosfos holds it is a Torah law.
Ramban holds it is half & half.
Now may be a good time for a gem of Torah study.