Monday
Monday possesses zero stealth capability. Its arrival is broadcast through every calendar application, office memo, and church bell tower on the planet. There exists no Monday that has ever caught anyone by surprise; the day announces itself with the subtlety of a brass band.
One always knows precisely when Monday shall arrive. This absolute predictability represents the antithesis of stealth. Monday has never successfully ambushed anyone; it simply marches forward with the inexorability of continental drift.
Fox
The fox has elevated stealth to an art form refined across millennia. Silent paws designed for minimal ground contact, retractable claws for noise reduction, and a hunting technique called 'mousing' that involves precision vertical leaps onto unsuspecting prey. The red fox can hear a mouse rustling beneath thirty centimetres of snow and strike with lethal accuracy.
Urban foxes have developed additional stealth protocols, navigating human infrastructure with ghost-like efficiency. A fox may live within metres of human habitation for years without detection. Monday could never achieve such invisibility, though one suspects it would not desire to.