I think this is what you’re looking for hopefully
Some of the evidence comes from fossils, and some comes from studies that show how similar living things are to one another. By the 1930s, scientists had also learned about genes. As a result, they could finally explain how characteristics of organisms could pass from one generation to the next and change over time
The planet would be Neptune and Earth's average time is 365.2 days aka a full year (1 year).