I just read this myself and wanted to share because I love to immerse myself in the culture around the Way, and this cultural custom had gone unnoticed to me until reading this fantastic post. Thank you for sharing it here!
"Today, there’s a set of rules that determine when a furancho can open (for no longer than three months, and no later than July 31), what dishes can be served and how many (five, from a government approved list of 11) and what drinks can be poured (wine, water, and sweetened carbonated water, but no liquor, beer or soda)."
It's very charming and another nice way to support the local economy. The article is about a 3 minute read and well worth it if you love Galicia! I may need to shift my walking dates from September to June lol