Casual Friday is an American and Canadian trend which has spread to other parts of the world, wherein some offices may celebrate a semi-reprieve from the constrictions of a formal dress code. Whereas, during the rest of the week, business shirts, suits, ties, trousers, and dress shoes would be the norm, on Casual Friday workers might be allowed to wear more casual dress. Some companies might allow jeans, casual blouses or T-shirts, hoodies, track jackets, and sneakers/running shoes or even stocking feet, but others require business casual or smart casual dress. Some offices allow a themed dress down day. On this day, even managers in such workplaces are allowed to dress down. In workplaces that have no dress codes some employees enjoy ‘Formal Fridays’ by dressing up on Friday.