The long-lived Elves typically measured the passage of time in periods they called yéni, with each yén lasting for one hundred and forty-four solar years. They also measured individual years, and they had two names for these: coranar and loa. Of these the coranar or 'sun-round' was a year considered in astronomical terms (while a loa was concerned with the cycles of nature). Each of the long yéni contained a total of 52,596 days which, divided by the 144 solar years of each yén, made a coranar last 365¼ days, the precise length of a solar year.