Mon¬day a suit, Fri¬day jeans — Casual Fri¬days, where peo¬ple are allowed to dress down, are always a pop¬u¬lar tra¬di¬tion in North Amer¬ica. So don’t be sur¬prised if the entire office wears denim on Fri¬day to cel¬e¬brate the upcom¬ing end of the work week.