This Saturday, Urban Tavern (333 O’Farrell Street) is going green for Earth Hour. This worldwide event involves hundreds of millions of people, businesses and governments around the world, switching off their lights as a call to action on climate change.

To commemorate this historic moment, Urban Tavern will be donating a portion of their sales to the World Wildlife Fund, in addition to reducing its lighting throughout the evening. The mixologist behind the bar have also designed their own special cocktail for the day–the Mother Earth Margarita–made with Casa Noble organic tequila, lime juice, agave syrup, and Qi exotic orange and white tea liquor. The drink will be served from 11:30AM until midnight for a cost of $13.

Beyond the sensational beverages at the bar, Urban Tavern also features gastropub cuisine always prepared with seasonal, locally-sourced organic ingredients that are well-suited to the spirit of this particular occasion. Don’t miss out on their mouth-watering meatball sliders–some of the best the city has to offer.