To check the domain age of a website, you can use online domain age checker tools or perform a WHOIS lookup. Here's how:

Online Domain Age Checker: Several websites offer domain age checker tools. Simply enter the website's URL, and the tool will provide you with the domain's creation date or age.

WHOIS Lookup: Use a WHOIS lookup service by visiting websites that provide this service. Enter the domain name in the lookup search box, and it will display information about the domain, including its creation or registration date.

Both methods are quick and easy ways to determine the age of a domain and can help you assess a website's credibility and authority.