Well, I only know how it tends to work in China, where the traditional calendar is used for cultural events such as festivals, while the Gregorian calendar is used for just about everything else, including domestic business. I assumed it’s the same in most modern cultures with a different traditional calendar, but maybe I’m wrong.
Everett is at least a minor toon force user, so normal power scaling doesn’t apply. He can beat anyone or be beaten by anyone depending on which is funnier.
Mrs. True can usually overpower him because he’s usually being a jerk to her, but when she’s in the wrong she’s usually cowed by him.