I saw the image above in the Earth Overshoot Day Media Backgrounder at Global Footprint Network and it made me wonder whether there was a list of dates in each year when Earth Overshoot Day fell. And I also became interested in the idea of asking people when they think the next Earth Overshoot Day (EOD) will fall. I wrote to the address in the ‘media backgrounder’ and this is the response I received:
Thank you for your email and your interest in Earth Overshoot Day.
We’ve never published a list of past Overshoot Days. However, my colleague has dug out the dates for the most recent years:
Earth Overshoot Day dates
August 22, 2012
September 27, 2011
August 21, 2010
September 25, 2009
September 23, 2008
October 6, 2007
October 9, 2006
October 11, 2005
Please keep in mind that it might be a little misleading to offer these dates as clues in a contest to guess this year’s date. Our methodology is constantly being refined, so calculations that were made two or three years ago would not have been as precise as those being made today. If we were to go back and recalculate the day we went into overshoot in 2008, for example, we would likely get a different date than Sept. 23.
I should also say that Overshoot Day 2010 was a total aberration. Our Science and Research team was still revising its methodology that year, so it decided to choose a “symbolic day” – rather than one based on calculations – for Overshoot.
Good luck with the poll. We will be very interested to learn how it goes for you.
Given that the global human population is rising (currently at just over 1% per year), and that our economy is based on ever-increasing growth, (and assuming that the folks at the Global Footprint Network don’t revise their algorithm again) it seems likely to me that EOD this year will continue to fall earlier every year.
As a bit of fun (and in an attempt to help to spread the word about our unsustainable habits!), I offer you:
The EOD poll for 2013
(Note: The poll is set to close in one month from today; the folks at the Global Footprint Network will announce EOD 2013 on their Earth Overshoot Day page and on their social media channels, including FaceBook, Twitter and Google+.)