Like many people, you may have had your Google account for quite a while. Google does not have a feature that expressly displays the creation date of your account.
However, if you are interested in locating it, there does exist a roundabout way of locating it.
Finding Your Google Account Creation Date
From a desktop computer, log in to your Gmail account. Then, click the gear icon to access your Account Settings.
Select Forwarding and POP/IMAP. POP forwarding will have been activated since the date of your account creation: