The phrase and its accompanying song are used far more broadly than the English "Happy Birthday": Sto Lat! - Polish American Cultural Center
"Sto lat i wszystkiego najlepszego" is the quintessential Polish celebratory greeting, combining a traditional song of longevity with a versatile wish for "all the best". While often used for birthdays, this combination is a cultural cornerstone for any major life milestone in Poland. The Components of the Greeting
: A versatile wish meaning "all the best" . It is the standard way to say "Happy Birthday" or "Best Wishes" for any positive occasion. Core Traditions and Occasions