Change date on archive page skin

Hello,

I would like to change the date format on my archive pages.
At Settings>Archive pages>Category Page skin I use grid view Classic skin.

And I would need a diferent, Hungarian date format.
Could you show me where I can change that?
https://ibb.co/hyKSK4S

Also, is it possible to list events without date yet. Let’s say to have a setting TBA – To Be Announced.
It would be great help.

Thanks.

Zsuzsa

The page I need help with: [log in to see the link]