Earth Hour 2019 was held on March 30 , from 8:30 p.m. to 9:30 pm . Miss Earth 2018 Nguyễn Phương Khánh from Vietnam was designated as the Earth Hour Ambassador to implement several environmental protection activities . As ambassador , Phuong Khanh urged everyone to voluntarily turn off unnecessary lights and equipment for an hour , contributing to spreading the message " Save Energy , Save Earth - Energy saving , Earth protection "
Miss Earth 2018
Miss Earth 2018
Earth Hour