GreenDay is a plastic-free picnic concert that invites general public to experience a sustainable lifestyle. The stage and movie screening are powered by 100% renewable energy. The event includes an exhibition and a VR area that shows the threats of plastic pollution to marine life, and Make Something workshops of T-Shirt Tote Bag. Following the success of last year's events, this year it features the concept of a plastic-free supermarket. 

2019年【GreenDay 綠・日子】於臺中國立臺灣美術館、臺北華山文創園區展開。繼去年第一年GreenDay深受歡迎的手作坊、現場100%綠能供電的音樂演出與電影播放，以及身歷其境的體驗區、無塑野餐等活動，今年更加入「無塑超市」體驗，讓未來超市的生鮮蔬果「裸裝」登場！