Mark your calendars: Give Miami Day is returning for its 15th year, giving people in South Florida another chance to open their wallets to help local causes.
The 24-hour philanthropic event, hosted by the Miami Foundation, is on Thursday, Nov. 19, from midnight to 11:59 p.m. But early online giving opens at midnight on Saturday, Nov. 14, and runs through Nov. 18
Give Miami Day began after a 2012 survey by the Knight Foundation revealed that the Miami metro area was the least civically engaged in the country…