Friday pm.
En found out about Earth Hour that falls on Saturday, from the radio.
En told Hui, "you know tomorrow is Earth Hour, Zhang Hui. We need to switch off the lights". I love Earth day. I asked En, "Why do you like Earth Hour?". En replied " I love to save the Earth".
Saturday am.
En woke up and she remember today is Earth Hour. She said "Today is Earth Hour! I am so happy".
As a matter of fact, our lights are usually off by 8-9pm. EnHui are early sleeper.