A domain name period has 365 days. The automate email will let you know 30 days, 15 days and 5 days before the expiration. Those email may go to your junk mail. To keep your domain name, we suggest to renew your domain name 2 week before the expiration. If you do not renew on time, it may be effected to your website and search engine result.
***To extend your domain name many years will make a good result to search engine and trusted to your website.