Google Search Engineer John Muller, tweeting with webmasters, said domain age is not a ranking factor.
“This statement is in doubt. Information about the domain (region, age, registration period) forms one of the three factors determining the trust of a site.
If you recall, then Google previously stated that the link mass is not a ranking factor, but in practice this has not been confirmed. And now, when conducting a competitive analysis, it is clear that these two factors (links and domain age) directly affect the site’s position in Google’s search results. ”