On Tue, Jan 28, 2003 at 02:37:31PM +1100, Rick Measham wrote: > > There are two time periods that do not change: Years (time the earth takes > to travel around the sun) and Days (time the earth take to spin one complete > revolution).
But they do change. If the length of a day was constant, we would not have leap seconds. However, we do. Also, the time it takes for the earth to travel around the sun isn't constant, but that's irrelevant. The years used in calenders used by humans typically count an integer number of days, and not the irrational number of days it takes for the earth to travel around the sun. I'm pretty sure 2004 won't have the same length as 2003. Abigail
