diff --git a/borgweb/borg/utility/time.py b/borgweb/borg/utility/time.py
index 116f28d..889c57d 100644
--- a/borgweb/borg/utility/time.py
+++ b/borgweb/borg/utility/time.py
@@ -1,4 +1,5 @@
 from datetime import datetime
+import calendar
 
 
 def time_ago(time: datetime, short=False, truncate=False):
@@ -53,3 +54,22 @@ def subtract_months(p_date: datetime, offset):
         return new_date.replace(month=12 - offset, year=new_date.year - 1)
     else:
         return new_date.replace(month=new_date.month - months)
+
+
+def last_day_previous_months(months_ago: int):
+    dates = []
+    current_date = datetime.utcnow().date()
+    current_year = current_date.year
+    current_month = current_date.month
+    dates.append(current_date)
+    for month in range(months_ago - 1):
+        if current_month == 1:
+            current_year -= 1
+            current_month = 12
+        else:
+            current_month -= 1
+        last_day = calendar.monthrange(current_year, current_month)[1]
+        current_date = current_date.replace(year=current_year, month=current_month, day=last_day)
+        dates.append(current_date)
+
+    return dates[::-1]
diff --git a/borgweb/borg/views/json.py b/borgweb/borg/views/json.py
index b75153e..3f3e673 100644
--- a/borgweb/borg/views/json.py
+++ b/borgweb/borg/views/json.py
@@ -2,11 +2,11 @@ from datetime import datetime, timedelta
 from django.http import JsonResponse
 from ..models import Repo
 from ..utility import data
-import calendar
+from ..utility.time import last_day_previous_months
 
 
 def repo_monthly_json(request, months_ago: int = 12):
-    date_labels = monthly_date_labels(months_ago)
+    date_labels = [date.strftime("%b %Y") for date in last_day_previous_months(months_ago)]
 
     repo_list = Repo.objects.all()
 
@@ -26,25 +26,6 @@ def repo_monthly_json(request, months_ago: int = 12):
     return JsonResponse(response_dict)
 
 
-def monthly_date_labels(months_ago: int):
-    dates = []
-    current_date = datetime.utcnow().date()
-    current_year = current_date.year
-    current_month = current_date.month
-    dates.append(current_date)
-    for month in range(months_ago - 1):
-        if current_month == 1:
-            current_year -= 1
-            current_month = 12
-        else:
-            current_month -= 1
-        last_day = calendar.monthrange(current_year, current_month)[1]
-        current_date = current_date.replace(year=current_year, month=current_month, day=last_day)
-        dates.append(current_date)
-
-    return [date.strftime("%b %Y") for date in dates][::-1]
-
-
 def repo_daily_json(request, days_ago: int = 30):
     repo_list = Repo.objects.all()
     dates = [(datetime.utcnow() - timedelta(days=day)) for day in range(days_ago)][::-1]