How and when was the year given 365 days where did the name year come from?

The earth's period of revolution around the sun has been studied since ancient times, so the exact date that it was determined is unknown. As far back as ancient Rome observers knew that earth takes slightly more than 365 days to complete its orbit, and the figure has been refined over the millennia as better astronomical tools have been developed.

The English Word "year" can be traced back to an Indo-European Word that transliterates as yehrom and refers to the seasons.