diff --git a/agenda/__init__.py b/agenda/__init__.py
index 169b72f..1d6e14a 100644
--- a/agenda/__init__.py
+++ b/agenda/__init__.py
@@ -98,15 +98,15 @@ def next_uk_fathers_day(input_date: date) -> date:
     return fathers_day
 
 
-def get_next_timezone_transition(tz_name: str) -> date:
+def get_next_timezone_transition(from_dt: datetime, tz_name: str) -> date:
     """Datetime of the next time the clocks change."""
     tz = pytz.timezone(tz_name)
-    dt = next(t for t in tz._utc_transition_times if t > now)
+    dt = next(t for t in tz._utc_transition_times if t > from_dt)
 
     return typing.cast(date, dt.date())
 
 
-def get_next_bank_holiday() -> dict[str, date | str]:
+def get_next_bank_holiday(input_date: date) -> dict[str, date | str]:
     """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")
@@ -119,7 +119,7 @@ def get_next_bank_holiday() -> dict[str, date | str]:
     next_holiday = None
     for event in events:
         event_date = datetime.strptime(event["date"], "%Y-%m-%d").date()
-        if event_date < today:
+        if event_date < input_date:
             continue
         next_holiday = {"date": event_date, "title": event["title"]}
         break
@@ -260,10 +260,10 @@ def stock_markets() -> list[str]:
     return reply
 
 
-def get_us_holiday() -> dict[str, date | str]:
+def get_us_holiday(input_date: date) -> dict[str, date | str]:
     """Date and name of next US holiday."""
-    hols = holidays.UnitedStates(years=[today.year, today.year + 1])
-    next_hol = next(x for x in sorted(hols.items()) if x[0] >= today)
+    hols = holidays.UnitedStates(years=[input_date.year, input_date.year + 1])
+    next_hol = next(x for x in sorted(hols.items()) if x[0] >= input_date)
 
     return {"date": next_hol[0], "title": next_hol[1]}
 
@@ -276,13 +276,13 @@ def get_data() -> dict[str, str | object]:
         "now": now,
         "gbpusd": get_gbpusd(),
         "next_economist": next_economist(today),
-        "bank_holiday": get_next_bank_holiday(),
-        "us_holiday": get_us_holiday(),
+        "bank_holiday": get_next_bank_holiday(today),
+        "us_holiday": get_us_holiday(today),
         # "next_uk_general_election": next_uk_general_election,
         "next_us_presidential_election": next_us_presidential_election,
         "stock_markets": stock_markets(),
-        "uk_clock_change": get_next_timezone_transition("Europe/London"),
-        "us_clock_change": get_next_timezone_transition("America/New_York"),
+        "uk_clock_change": get_next_timezone_transition(now, "Europe/London"),
+        "us_clock_change": get_next_timezone_transition(now, "America/New_York"),
         "mothers_day": next_uk_mothers_day(today),
         "fathers_day": next_uk_fathers_day(today),
         "uk_financial_year_end": uk_financial_year_end(today),