Work and Halacha Cross?

[gnomi]

Today is the US federal holiday observing New Year's Day, so I am off work. Last week, I had the day off in observance of the federal holiday for Christmas. And the week before, we had Friday 23 December off. This means we had three weeks in a row that were four-day weeks. This led someone in a meeting to propose that we always have four-day weeks, and I said there was halachic (Jewish law) basis for this. We say in halacha that three incidents can be considered a chazakah (precident). So three incidents of four-day weeks in a row could, in fact, set precident.

However, I don't believe my company follows halacha when creating the corporate calendar.