Date Format using "F" not displaying Full month

I’m struggling to get the Full month to show for an ACF field.

I have the following:

{acf_wpcf-died:d F Y}

Which is outputting: “27 Jan 1980”

I should be seeing “27 January 1980”

All other formats work: m d y Y etc. It’s just F that simply won’t give the Full month name.

However I’m seeing the same issue when viewing the date settings for Wordpress itself:

Screenshot 2023-06-10 at 13.40.33

Does anyone know what could be at play here?

Turns out it was the Wordpress language setting. It was English (South Africa) which for some reason wasn’t allowing full month names. Changing it to English (UK) fixed the issue.