Earth Hour 2019 will be observed on March 30 from 8:30 pm to 9:30 pm. The observance encourages people to switch off their non-essential lights and conserve energy. The hour is aimed at making people aware of the worsening condition of the planet. People put out their lights and observe the hour by doing various activities. Some of the popular ones include painting workshops, candlelit dinners, musical nights and stargazing.