For guys, business casual comprises of formal pants or Docker-style pants. Dress shirts are authorized and may be collared or mock; shirts may be worn outside pants if the shirt is meant for that purpose. Shoes should be closed-toed shoes. For girls, business casual means wearing slacks or jeans and a blouse or sweater. The same rules apply as for men with respect to dress shirts: they can be collarless or have a bowtie or starch mark on them. Shirts may be worn over trousers or skirted dresses. Heels are not appropriate for business casual events. At a Colonial golf tournament, everyone will be dressed formally. Men should wear white shirts with dark suits or light colored suits. Women should wear floral prints or plain colors with nice clothes. Both men and women should wear low heels or flats to match the informal atmosphere. Colonial-style events usually take place in late April or early May. If you want to look your best at this event, we recommend you read our guide on what to wear in early spring.