Copy the Relative Date override from the site, create a new code override file in your Framer project from the left-hand panel (Code section → click the plus icon → select Override), and paste the code

Select the text layer on your canvas that contains the date you want to make relative

In the right-hand properties panel, click the plus icon next to Override, select your override file, and choose the RelativeDate function

Customize the Relative Until (days) value if needed - this controls how many days back the override will format dates relatively before showing the original date (default is 365 days)