Change date format

Hi.

I use template paperbox (which is currently not supported – author is not responding) and I want to customize date format in posts. It seems like the theme uses custom date format and translations, because I can’t change date format using default settings in WP admin. And I want to translate the date (names of months) to my local language.

But I am not able to find the file where is the translation. Is it somehow possible to find out where are stored names of months in my template? I tried to find it using
grep -H -r "July" /var/www/html/selfici.com/wp-content/themes/paperbox/ (I have my website on linux VPS) but I was not successful. I also tried to find it using Adminer directly in my database but I was not sucessful as well. So it looks like it is defined nowhere, but it has to be somewhere 🙂

So is there any way how to find names of months and translate it directly to my local language?

My website is https://www.selfici.com/cs/