No, not -1 or +1 to Earth, but -1 to mankind.
But hey... we're alive right? :/ Un-***ing-fortunately......
There have been about 514 Leap Years since Caesar created it in 45BC. Without the extra day every 4 years, today would be July 28, 2013. Also, the Mayan calendar did not account for leap year...so technically the world should have ended 7 months ago.
Oh world.