Earth Overshoot Day is the date when we have used more from nature than the planet can replenish this year. Can you guess the date for 2019?

We invite all students and educators to enter our contest to guess the date of Earth Overshoot Day – the date when we have used more from nature than the planet can replenish throughout the whole year. In 2018, that day fell on August 1st.

Explore the open data platform and use other information available on this website (hints here and there) to calculate your best estimate for Earth Overshoot Day 2019.

Our hope is that participants gain a better understanding of what Earth Overshoot Day is all about. And we want them to learn why solutions to #MoveTheDate are crucial to achieving sustainability, as defined by humanity’s ability to live within the means of our one planet or one-planet compatibility.

To help students and their teachers with this activity, we have created a Lesson Plan, ideal for grades 6-8, but adaptable for other grade levels.

May 22, 2019 (International Day for Biological Diversity) is the deadline to submit the calculation methodology and result.

The winner, as well as the date of Earth Overshoot Day 2019, will be announced on June 5.

Good luck! And/or help us spread the word!

Wondering how you can help #MoveTheDate of Earth Overshoot Day towards one-planet living?

You’re in the right place. Since we launched the Earth Overshoot Day campaign in 2006, we’ve been calculating the date of Earth Overshoot Day each year for every year, going back to the early 1970s when the world first fell in ecological deficit. Over time, we’ve expanded this campaign to include Steps to #MoveTheDate so that anyone may feel empowered to take action in their own life. Because if we #MoveTheDate five days out every year, we’d be under one planet before 2050. More than ever we understand that #MoveTheDate can’t stop at Earth Overshoot Day and must live throughout the year. The movement keeps growing. There’s no time to lose. We need you. We depend on you. Please consider supporting our work for as little as $5. One hundred dollars helps us generate 2 million media impressions during Earth Overshoot Day. Thank you!