From dusk until dawn, for the duration of the bird migration, building owners, managers and tenants in San Francisco are being asked to turn off unnecessary lights or close drapes, draw blinds or pull shades to help reduce the incidences of collisions that kill approximately 1 billion birds in North America each year. Spring migration is February 15th through May 31st, and the fall migration is August 15th through October 31st. To learn more visit https://goldengatebirdalliance.org/ Lights Out