# How much effort would be required to fix the Earth's rotation?

Given that the earth's rotation has been slowing down by very slight amounts over time, forcing us to introduce leap seconds and so forth into our clocks and calendars, I would like to ask if this could be fixed by "generating" more spin via some sort of power plant like structure(s) with a massive spinning object. (would it be ideal for these to be on the equator?)

How much energy would be needed in order to change the length of a year by 1 second?

what about in order to eliminate February 29th such that we don't need a "leap day" anymore? (24 hours over 4 years) - note that for this, the spin would need to be altered such that the day is removed, but then returned to near its original state such that we don't keep losing days

related Q/A: the earth IS slowing down (rotationally)

• You're going about this the wrong way. I need some more sleep. Oct 26, 2014 at 17:07
• We can organize a huge marathon before leaping day, all people running in the same direction of earth's rotation. That will slow down the Earth a little bit until people stop running. But I am not sure how many people you need. But for sure, the Chinese and the Indian will contribute disproportionately, and they have a different calendar, so they might not want to do it.
– user65081
Oct 26, 2014 at 17:29
• @dmckee - You'll get one extra hour of sleep a week from now when daylight savings time ends. Oct 26, 2014 at 20:44
• Relevant XKCD: what-if.xkcd.com/26 Oct 26, 2014 at 22:37
• @user2813274 No that only gets me 2 hours of accumulated time. I want two more hours in every single day. I believe I have to wait roughly 75 million years for that... (Figure assumes that Vernor Vinge used reasonable values in Across Realtime, because I'm not going to check it.) Oct 27, 2014 at 1:23