diff --git a/agenda/__init__.py b/agenda/__init__.py
index e886588..1641601 100644
--- a/agenda/__init__.py
+++ b/agenda/__init__.py
@@ -119,7 +119,7 @@ def timezone_transition(
     ]
 
 
-async def get_next_bank_holiday(input_date: date) -> list[Event]:
+async def get_next_bank_holiday(start_date: date, end_date: date) -> list[Event]:
     """Date and name of the next UK bank holiday."""
     url = "https://www.gov.uk/bank-holidays.json"
     filename = os.path.join(data_dir, "bank-holidays.json")
@@ -129,15 +129,13 @@ async def get_next_bank_holiday(input_date: date) -> list[Event]:
             r = await client.get(url)
         open(filename, "w").write(r.text)
 
-    year_later = input_date + timedelta(days=365)
-
     events = json.load(open(filename))["england-and-wales"]["events"]
     hols: list[Event] = []
     for event in events:
         event_date = datetime.strptime(event["date"], "%Y-%m-%d").date()
-        if event_date < input_date:
+        if event_date < start_date:
             continue
-        if event_date > year_later:
+        if event_date > end_date:
             break
         hols.append(Event(name="bank_holiday", date=event_date, title=event["title"]))
 
@@ -329,7 +327,7 @@ async def get_data(now: datetime) -> typing.Mapping[str, str | object]:
     ) = await asyncio.gather(
         fx.get_gbpusd(config),
         gwr.advance_ticket_date(data_dir),
-        get_next_bank_holiday(today),
+        get_next_bank_holiday(last_year, next_year),
         thespacedevs.get_launches(rocket_dir, limit=40),
     )