Open Data Day End Of Year Party Each year we end the year by converting our last Tuesday night, Community Action Night, into a social. Let’s discuss the plans and dates here. Community Action Nights Hack For Change Hack For Change (HFC) is our annual fall event. It often occurs in conjunction with Code for America’s National Day of Civic Hacking. It is a community event that is more design-a-thon than hack-a-thon.