The DSNY Columbia Association presents a customizable calendar for all DSNY employees. Simplified, familiar, and easy to use. Keep records of your daily activities. Stay up to date with all DSNY Columbia Association events and meetings. Includes locations to garages in all five boroughs. Established in 1936, the DSNY Columbia Association is one of the oldest, largest, and most vibrant fraternal organizations within the City of New York’s Uniformed Forces. Together we are one. United we are Stronger!