diff --git a/agenda/utils.py b/agenda/utils.py
index 974f554..0c17610 100644
--- a/agenda/utils.py
+++ b/agenda/utils.py
@@ -42,6 +42,11 @@ def timedelta_display(delta: timedelta) -> str:
     )
 
 
+def plural(value: int, unit: str) -> str:
+    """Value + unit with unit written as singular or plural as appropriate."""
+    return f"{value} {unit}{'s' if value > 1 else ''}"
+
+
 def human_readable_delta(future_date: date) -> str | None:
     """
     Calculate the human-readable time delta for a given future date.
@@ -64,14 +69,11 @@ def human_readable_delta(future_date: date) -> str | None:
     weeks, days = divmod(days, 7)
 
     # Formatting the output
-    parts = []
-    if months > 0:
-        parts.append(f"{months} month{'s' if months > 1 else ''}")
-    if weeks > 0:
-        parts.append(f"{weeks} week{'s' if weeks > 1 else ''}")
-    if days > 0:
-        parts.append(f"{days} day{'s' if days > 1 else ''}")
-
+    parts = [
+        plural(value, unit)
+        for value, unit in ((months, "month"), (weeks, "week"), (days, "days"))
+        if value > 0
+    ]
     return " ".join(parts) if parts else None