diff --git a/agenda/data.py b/agenda/data.py
index 5b4a394..8e3135f 100644
--- a/agenda/data.py
+++ b/agenda/data.py
@@ -86,7 +86,7 @@ def get_holidays(country: str, start_date: date, end_date: date) -> list[Holiday
     """Get holidays."""
     found: list[Holiday] = []
     for year in range(start_date.year, end_date.year + 1):
-        hols = holidays.country_holidays(country.upper(), years=year, language="en")
+        hols = holidays.country_holidays(country.upper(), years=year, language="en_US")
         found += [
             Holiday(
                 date=hol_date,