diff --git a/budget/static/budget/js/budget.js b/budget/static/budget/js/budget.js
index a07015242e0670dfc0358dd4545bc53312ff70da..66f8b5434011a2785f328be054488898270a5d40 100644
--- a/budget/static/budget/js/budget.js
+++ b/budget/static/budget/js/budget.js
@@ -48,11 +48,10 @@     confirmButtonText: "Yes",
     reverseButtons: true,
     showLoaderOnConfirm: true,
     preConfirm: () => {
-      const dt = calendar.getDate();
       fetch("/copy/", {
         method: "POST",
         headers: {"X-CSRFToken": csrftoken},
-        body: JSON.stringify({"month": dt.getMonth() + 1, "year": dt.getFullYear()}),
+        body: JSON.stringify({"month": calendar.getDate().getMonth() + 1}),
       }).then(() => calendar.refetchEvents());
     }
   });
@@ -235,4 +234,4 @@       }
     }
   }
   return cookieValue;
-}
+}
\ No newline at end of file
diff --git a/budget/utils.py b/budget/utils.py
index 3cf95a098bfbe0c58e3c1a8604e2cd48a9ddf71a..e4490956053d9985ae180772ce0eefaf27b449f8 100644
--- a/budget/utils.py
+++ b/budget/utils.py
@@ -1,9 +1,10 @@
-from calendar import monthrange
 from datetime import date, timedelta
+from calendar import monthrange
 from typing import Tuple
 
 
-def prev_month_range(current_month: int, current_year: int) -> Tuple[date, date]:
+def prev_month_range(current_month: int) -> Tuple[date, date]:
+    current_year = date.today().year
     if current_month == 1:
         month = 12
         year = current_year - 1
@@ -14,10 +15,9 @@     first_day = date(year, month, 1)
     last_day = date(current_year, current_month, 1) - timedelta(days=1)
     return first_day, last_day
 
-
 def add_months(dt: date, months: int) -> date:
     month = dt.month - 1 + months
     year = dt.year + month // 12
     month = month % 12 + 1
     day = min(dt.day, monthrange(year, month)[1])
-    return date(year, month, day)
+    return date(year, month, day)
\ No newline at end of file
diff --git a/budget/views.py b/budget/views.py
index 45eff9a023d7afeb950604298d7ab4692c7dcb8c..567b95c0743eefde7782bb8dded67443a38bf530 100644
--- a/budget/views.py
+++ b/budget/views.py
@@ -1,15 +1,14 @@
-import json
-from datetime import date, datetime, timedelta
-
 from django.conf import settings
+from django.shortcuts import render
 from django.contrib.auth.mixins import LoginRequiredMixin
-from django.http import HttpRequest, HttpResponse, JsonResponse
-from django.shortcuts import render
 from django.urls import reverse
 from django.views import View
+from django.http import HttpRequest, JsonResponse, HttpResponse
+from datetime import date, datetime, timedelta
+from .models import Transaction, Recurrence
+import json
 
-from .models import Recurrence, Transaction
-from .utils import add_months, prev_month_range
+from .utils import prev_month_range, add_months
 
 BLUE = "#3788d8"
 YELLOW = "#d4a574"
@@ -21,17 +20,13 @@
 
 class IndexView(LoginRequiredMixin, View):
     def get(self, request: HttpRequest) -> HttpResponse:
-        return render(
-            request,
-            "budget/index.html",
-            {
-                "json_ctx": {
-                    "debug": settings.DEBUG,
-                    "adminIndex": reverse("admin:index"),
-                    "showAdmin": request.user.is_staff,
-                }
-            },
-        )
+        return render(request, "budget/index.html", {
+            "json_ctx": {
+                "debug": settings.DEBUG,
+                "adminIndex": reverse("admin:index"),
+                "showAdmin": request.user.is_staff,
+            }
+        })
 
 
 class EventsView(LoginRequiredMixin, View):
@@ -73,6 +68,7 @@         return JsonResponse(events, safe=False)
 
 
 class TransactionView(LoginRequiredMixin, View):
+
     def post(self, request: HttpRequest) -> HttpResponse:
         data = json.loads(request.body)
         props = data["extendedProps"]
@@ -118,14 +114,9 @@
 
 class CopyView(View):
     def post(self, request: HttpRequest):
-        data = json.loads(request.body)
-        month = data["month"]
-        year = data["year"]
-        first, last = prev_month_range(month, year)
-        transactions = Transaction.objects.filter(
-            date__range=[first, last],
-            recurrence__in=[Recurrence.WEEK, Recurrence.MONTH],
-        )
+        month = json.loads(request.body)["month"]
+        first, last = prev_month_range(month)
+        transactions = Transaction.objects.filter(date__range=[first, last], recurrence__in=[Recurrence.WEEK, Recurrence.MONTH])
         for transaction in transactions:
             if transaction.recurrence == Recurrence.MONTH:
                 transaction.id = None
@@ -142,4 +133,4 @@                         transaction.id = None
                         transaction.save()
                     else:
                         break
-        return HttpResponse()
+        return HttpResponse()
\ No newline at end of file