Switching off your lights for Earth Hour is a symbolic gesture to promote climate action.
Switching off the lights for an hour - a simple idea that will bring millions of people together this year to celebrate what is known as Earth Hour.
Organised by the World Wildlife Fund (WWF), this 60-minute celebration of our planet will take place on 25 March this year.
Earth Hour has been uniting people all over the world, in more than 190 countries, since 2007.
This year, on the last Saturday in March, communities and businesses will switch off their lights between 8.30 and 9.30pm local time to show care and support for planet Earth.
As well as turning off your lights, you are encouraged to get involved in other activities to promote climate action on this day.
The organisers have put together a list of 20 ways you can take part.
Turn off all lights
Listen to a podcast
Have a night of board games or reading by candlelight
Improve your knowledge of climate change
Watch an educational video
Camp in your backyard or living room
Pick up litter in your local park
Clear out your wardrobe and donate unwanted clothes to charity
Replace non-eco friendly items in your home with sustainable alternatives
Practice some nighttime photography
Install energy efficient light bulbs around your house
Go for a walk outdoors
Use Google Lens to learn about plants and animals in your neighbourhood
Try out stargazing
Birdwatch from your window
Sort out your recycling
Join an Earth Hour event near you