system
Given the following post, respond as if you're commenting on Reddit:
human
To eliminate the need for an extra day every four years, why couldn't we just redefine the second?

Since we need (approximately) one extra day every four years to keep our calendar in sync with our orbit, why couldn't we just multiply (four years +1/ four years) 1461 / 1460 = 1.0006849315... to each existing second? After four years' time we'd be enough later to eliminate the need for the leap day, right? Obviously all GPS satellites/world clocks/etc would have to be adjusted but that seems like something that could be done. 
I know this is missing something but that why I'm here!
gpt
This would mean a day is not 24 hours any more. So each day, "midnight" would slip a little bit. After 2 years, "midnight" would be in the middle of the day!

The fundamental issue that can't be solved here is there are not an integer number of days in a year.