We believe there’s no better way to understand the significance of Earth Overshoot Day

than figuring out how to calculate the date.

Earth Overshoot Day marks the date when humanity’s demand for ecological resources and services in a given year exceeds what Earth can regenerate in that year.

Join us in striving to #movethedate. All of us, individuals, NGOs, businesses, governments, can take action and implement projects, big and small, in order to chart the path to a world where all live well within the ecological resource budget that the planet can afford us.

But first things first: managing our ecological resource budget requires measuring how much we have and how much we consume. So start now. Discover the new Ecological Footprint Explorer ! Use Global Footprint Network’s open data platform to explore, grab, and use relevant data in order to come up with your best estimate for Earth Overshoot Day 2017, the date when we have used all the renewable natural resources that the planet can replenish this year.

May 22, 2017 is the deadline to submit your calculation methodology and result.

Winners will be announced on June 5, 2017, World Environment Day. They will be featured and celebrated on this website and on social media as Ecological Footprint Champions, as we launch the #movethedate pledge platform.


We especially want to encourage teachers to participate to our Guess-the-Date Contest with their students. One winning classroom per grade will be featured on this website when winners are announced on June 5.

Please submit your classroom’s entry here. And don’t hesitate to reach out to us with any question: info@footprintnetwork.org

2017 Partners

Creating a Sustainable World

Click to explore projects to reduce the Ecological Footprint to create a future where people and planet thrive.


Explore Solutions

Thriving lives within the means of our planet is not out of our reach. In addition to the focus on transforming our energy systems as highlighted by the Paris Climate Agreement, we see three major areas of opportunity for improving sustainability: food, cities, and population.









How we meet one of our most basic need–food–is a powerful way to influence sustainability. Sourcing food locally and avoiding highly processed foods can lower the Ecological Footprint. Emphasizing plant-based diets and reducing animal protein can also have a major impact. Learn More

Eighty percent of the world population is expected to live in cities by 2050. Consequently, city planning and urban development strategies are instrumental to balancing the supply of natural capital and population’s demand. Examples include energy-efficient buildings and adequate public transportation. See how the Ecological Footprint approach is transforming Vancouver one neighborhood at a time.

Being committed to everyone living secure lives in a world of finite resources requires addressing population growth. Empowering women is essential for global sustainability. When women are respected as equal partners in the household and in the community, lower reproductive rates invariably ensue. Learn More

Decarbonizing the economy is our best possible chance to address climate change, and would improve the balance between our Ecological Footprint and the planet’s renewable natural resources. Per the 2015 Paris Accord on Climate, capping the global temperature rise at below 2°C implies keeping CO2e- atmospheric concentration below 450 parts per million (ppm). In 2016, the atmosphere contained 407 ppm CO2e-. The current carbon Footprint adds 2 ppm per year.

Calculate Your Footprint

Use our online calculator (desktop only) to measure your Ecological Footprint and learn how you can reduce it.

How does your country measure up on the path to sustainable development?

Dive into Ecological Footprint data, country by country; compare countries; study specific timelines; explore links between the Ecological Footprint and human development.

Footing the Bill: 

Art and our Ecological Footprint

Explore and enjoy this online art exhibition addressing the urgent need to live sustainably within Earth’s finite resources, curated by Art Works for Change.

Recent Blog Posts

By the Numbers

million years ago life first evident on Earth
increase in world population since 1970
decline in average population size of vertebrate species since 1970
of humanity’s Ecological Footprint is carbon


Earth Overshoot Day is an initiative of Global Footprint Network, an international research organization that is changing the way the world measures and manages its natural resources. The date of Earth Overshoot Day is calculated with data from Global Footprint Network’s National Footprint Accounts. Join our mailing list.