The idea to dress casual on a working day to raise funds for charity originated from the United States. The Community Chest first introduced this idea to Hong Kong in 1993.

Dress Casual Day is a popular fund-raising event. The number of participants is increasing every year. In order to increase the involvement of the participants in the event, different competitions are held every year. All the participating organisations and schools also carry out some internal functions to show their support.

Last year, with the support of over 360,000 participants from about 1,100 organisations, schools and government departments, over HK$19.5 million was raised.

Each year, souvenir stickers are given to participants to show their support for the event and their care for the needy. Participants can also keep the souvenir stickers as a memento.