Add date modified

Hi –

I currently don’t show the published date on my posts, but I’m thinking of adding them back (easy with my theme), and maybe add the modified date.

I saw this previous ticket asking about adding the modified date it as a rich snippet, but I don’t know where would I put that code. https://support.rankmath.com/ticket/add-date-modified-to-article-and-review/

Do you have any tutorials on how to do this? Or, could you lead me in the right direction?

My site is https://www.globotreks.com