Changing the format of the date in YAML in Linux Mint

What I’m trying to do

There is a Date and a Date & Time property in YAML frontmatter. When not viewed in Obsidian as source, it displays the date in MM/DD/YYYY format.
I want to change it to YYYY/MM/DD (or better, DD/Mon/YYYY, as in 12 Apr 2024, if that is possible). I’m using Linux Mint Cinnamon 22.1.

Things I have tried

I have heard something about changing an environment variable in the flatpak, but looking it up briefly, I’m not sure where I would even begin.