The Seattle Foundation has issued a challenge: Make a charitable donation today to your favorite King County nonprofit—be it the Frye or SIFF, Pacific Science Center or New Century Theatre Company—and GiveBig sponsors will match your gift. The foundation is hoping for the single biggest day of charitable giving in Seattle’s history; we have until midnight tonight to make that happen.

Rally for a cause at seattlefoundation.org/givingcenter/givebig.