This code was written in pure vibe-coding style — mostly for fun. I've got about 10 years of experience in IT, and even I fully agree: a 1000-line main file like this one probably deserves to be locked away in a secure facility.

But hey — if it's stupid and it works, it ain't stupid.

The readme is the typical AI verbal diarrhoea of so many words saying so little it hurts. You should ask it to be a bit more concise.

As a separate comment, would it not be better to ask for your plan on first run and setup a config file to remember it? With a note how to change it. Rather than rely on cmd line variables?

Also, shouldn't it be able to pick up the timezone from the local computer? Why would it "default" to a fixed timezone of poland?

Always depends on the cost of failure I suppose.