Flag day (Hong Kong)
A flag day in Hong Kong is a day on which public fundraising of charities takes place. Organised public fundraising in Hong Kong must be government-approved. Historically, it had been held only on a Saturday. It is currently, however, organised on Wednesdays and Saturdays. Flag-selling hours are from 7:00 in the morning to 12:30 in the afternoon on a flag day.
On a flag day, volunteers with some stock of "flags" and a bag to collect donations stand on streets to raise funds from passers-by. In the past, actual small flags were handed out to people who gave money. Nowadays, people receive a little sticker, which typically bears the name and logo of the beneficiary, to place on their clothing after they donate money. Those stickers for particular use in a flag day are still called "flags", in both English and Cantonese.