In 2016, Earth Overshoot Day fell on August 8. It was calculated with a model that “nowcasts” 2012 data to 2016.
However, every year Global Footprint Network improves its methodology and updates data to release a new edition of its National Footprint Accounts, which are used to calculate Earth Overshoot Day. Consequently, it is inaccurate to simply look at media accounts from previous years to determine past Earth Overshoot Days. Instead, a true apples-to-apples comparison of Earth Overshoot Days can only be made within the same edition of the National Footprint Accounts.
The dates of past Earth Overshoot Days, as calculated with the National Footprint Accounts 2017 Edition, are: