Parking in Lucerne/Luzern

I searched some old threads and the city of Luzern website but I couldn't find the answer I was looking for.

I want to make a day trip to Luzern on a Sunday, I saw some posts on TripAdvisor that parking in the blue zones is free on Sundays but those posts are a few years old and I don't see anything about that on the city website. I assume that this is no longer accurate but if anyone knows for sure that would be very helpful. The next best option I found was 10 CHF day pass to park in zone Z (there is one nearby to where I am going). Are there parking kiosks where you obtain these passes? The website also doesn't have useful information on how to acquire day passes.

Thanks in advance!

Saw this come by last week: https://www.luzernerzeitung.ch/zentr...den-ld.2180896