diff --git a/agenda/data.py b/agenda/data.py
index 8e3135f..443f666 100644
--- a/agenda/data.py
+++ b/agenda/data.py
@@ -136,17 +136,6 @@ async def bristol_waste_collection_events(
 
 def combine_holidays(holidays: list[Holiday]) -> list[Event]:
     """Combine UK and US holidays with the same date and title."""
-
-    all_countries = {h.country for h in holidays}
-
-    standard_name = {
-        (1, 1): "New Year's Day",
-        (1, 6): "Epiphany",
-        (12, 8): "Immaculate conception",
-        (12, 25): "Christmas Day",
-        (12, 26): "Boxing Day",
-    }
-
     combined: collections.defaultdict[
         tuple[date, str], set[str]
     ] = collections.defaultdict(set)
@@ -154,21 +143,12 @@ def combine_holidays(holidays: list[Holiday]) -> list[Event]:
     for h in holidays:
         assert isinstance(h.name, str) and isinstance(h.date, date)
 
-        event_key = (h.date, standard_name.get((h.date.month, h.date.day), h.name))
+        event_key = (h.date, h.name)
         combined[event_key].add(h.country)
 
     events: list[Event] = []
     for (d, name), countries in combined.items():
-        if len(countries) == len(all_countries):
-            country_list = ""
-        elif len(countries) < len(all_countries) / 2:
-            country_list = ", ".join(sorted(country.upper() for country in countries))
-        else:
-            country_list = "not " + ", ".join(
-                sorted(country.upper() for country in all_countries - set(countries))
-            )
-
-        title = f"{name} ({country_list})"
+        title = f'{name} ({", ".join(country.upper() for country in countries)})'
         e = Event(name="holiday", date=d, title=title)
         events.append(e)