Our casual Friday in the office. It now is my favorite day and not because it's the weekend the next day either.
Casual Friday along with dressing casually during the week became very prevalent during the late 1990s, rooted in a relaxed California-based business culture. The day (also known as Dress-down Friday, where some offices may celebrate a semi-reprieve from the constrictions of a formal dress code. Whereas, during the rest of the week, expensive dresses and heels for the women and 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. On this day, even managers in such workplaces are allowed to dress down.
The beginnings of Casual Friday go back to at least 1947, when the city of Honolulu allowed workers to wear the Aloha shirt part of the year. The term Aloha Friday dates from the 1960s, when the shirts were worn on Fridays instead of normal business attire. It may be seen as a corporate response attempting to raise worker morale in a sometimes stifling white-collar office environment.
They were right. It works.