Citizen's Eco Drive Spin studio.

Citizen Watch is lighting up the Flatiron district.

To commemorate the 40th anniversary of its Eco Drive, an eco-friendly watch, and Earth Day, Citizen set up a Spin studio in the street where riders pedaled to symbolically light up the earth.

For every rider who participated in the event, Citizen made a donation to Habitat for Humanity, with a minimum of $20,000 committed.