Problem with Date/Time in Variable Text

"It seems like he takes the current date, day and month."

That’s correct, Date/Time formatting uses the system local time, so you can’t Offset it (or Auto-increment that Offset) as you can with some of the other Variable Text options.

You can do it with CSV formatting, so you could set up a quick CSV with the months of the year, and then use that. Otherwise, you’ll need to manually edit the months in LightBurn. Thankfully, there aren’t too many.