These configurator/generator UIs were always a pain, but this example is pretty bad. The "weekly" and "monthly" options are broken and only allow "7" or "31". That many checkboxes even goes completely off the page.
That was enough for me to become immediately disinterested. I haven't looked at the page source, but I'm struggling to believe this was written by hand.
A few weeks ago this (pretty good) calendar generator got posted to HN: https://blankcal.app
It includes a preset for a yearly habit tracker (really just a year of checkboxes for one habit at a time — no option to print the habits on the calendar itself).
Tried to enter: ї
I think this app really speaks to the value of AI driven coding - it's clearly less polished than what an experienced SWE would produce given several days of time but at the same time offers real value and solves a niche problem.
Thanks for sharing OP, will use the app!