We have set our language to English (UK) and specified our date format in Confluence settings to be dd MMM yyyy.
However, for Confluence pages that are linked on Jira issues, we're seeing that the date format for the //date macro, when viewing the page in the pop-out/modal, is MMM dd, yyyy format, which is not what we want. It's shown correctly when viewing the very same page directly in Confluence.
Example screenshots are included (again, this is for the identical confluence page viewed in two different places).

