There are some reasons you might want to know the creation date of an Instagram account. It can be out of curiosity, management, advertising.. or maybe other business-related reasons, either way, fortunately there are a few methods to find the exact, or at least the approximate age of an account, which I will list below:
Instagram email registration date
The first method implies having access to the email address the Instagram account was created with: You can search for the first email from Instagram in your inbox, and if you find the welcome email along with the confirmation link, the date of this email is the time your account was made.
Date of first posted media
The second method, if we assume an user posted a media on its account feed right in the registration day, or not too further from it, we can estimate an approximate date from the date of that first post.
Instagram age checker tool
Although with a maximum estimation error of 1-2 months time, the third method is possible due to an online tool I made and posted here. It can check relative account age even if you don’t have access to an account email, or even if it doesn’t have a posted media on the feed. The tool uses a passive method to estimate the age, making it completely safe for using on as many accounts as you need.