diff --git a/ihatemoney.db b/ihatemoney.db
index b82834f2..00c32ee6 100644
Binary files a/ihatemoney.db and b/ihatemoney.db differ
diff --git a/ihatemoney/models.py b/ihatemoney/models.py
index fb0db673..4513b3e7 100644
--- a/ihatemoney/models.py
+++ b/ihatemoney/models.py
@@ -265,12 +265,13 @@ class Project(db.Model):
         )
 
     @staticmethod
-    def filter_by_date(query, start_date, end_date):
-        if start_date and end_date:
-            return query.filter(Bill.date >= start_date, Bill.date <= end_date)
+    def filter_by_date(query, start, end):
+        if start and end:
+            return query.filter(Bill.date.between(start, end))
         else:
             return query
 
+
     def get_bill_weights(self):
         """
         Return all bills for this project, along with the sum of weight for each bill.
@@ -292,9 +293,9 @@ class Project(db.Model):
         """Ordered version of get_bill_weights"""
         return self.order_bills(self.get_bill_weights())
 
-    def get_filtered_date_bill_weights_ordered(self, start_date, end_date):
+    def get_filtered_date_bill_weights_ordered(self, start, end):
         bill_weights_ordered = self.get_bill_weights_ordered()
-        filtered_bill_weights = self.filter_by_date(bill_weights_ordered, start_date, end_date)
+        filtered_bill_weights = self.filter_by_date(bill_weights_ordered, start,end )
         return filtered_bill_weights
 
     def get_member_bills(self, member_id):
diff --git a/ihatemoney/templates/list_bills.html b/ihatemoney/templates/list_bills.html
index 0ae8b8af..545e1148 100644
--- a/ihatemoney/templates/list_bills.html
+++ b/ihatemoney/templates/list_bills.html
@@ -107,12 +107,10 @@
 {% endif %}
 <form action="{{ url_for(".list_bills") }}" method="post">
     {{ csrf_form.csrf_token }}
-    <label for="start_date">Start Date:</label>
-    <input type="date" id="start_date" name="start_date" value="{{ start_date if start_date else '' }}">
-
-    <label for="end_date">End Date:</label>
-    <input type="date" id="end_date" name="end_date" value="{{ end_date if end_date else '' }}">
-
+    <label for="start">Start Date:</label>
+    <input type="date" id="start" name="start" value="{{ start if start else '' }}">
+    <label for="end">End Date:</label>
+    <input type="date" id="end" name="end" value="{{ end if end else '' }}">
     <input type="submit" value="Enter">
 </form>
 
diff --git a/ihatemoney/tests/filterbydate_test.py b/ihatemoney/tests/filterbydate_test.py
new file mode 100644
index 00000000..91732657
--- /dev/null
+++ b/ihatemoney/tests/filterbydate_test.py
@@ -0,0 +1,41 @@
+import pytest
+from unittest.mock import Mock
+from ihatemoney.models import Project, Bill
+
+
+@pytest.fixture
+def test_filter_by_date(Project):
+    # Prepare mock data
+    mock_query = Mock()
+    start_date = '2024-01-01'
+    end_date = '2024-12-31'
+
+    # Mock the methods being called inside filter_by_date
+    Project.query.filter.return_value = Mock()  # Assuming you're using SQLAlchemy's Query object
+
+    # Call the method to test
+    result = Project.filter_by_date(mock_query, start_date, end_date)
+
+    # Assertions
+    assert result == Project.query.filter.return_value  # Check if the method returns the expected result
+    Project.query.filter.assert_called_once_with(Bill.date >= start_date,
+                                                 Bill.date <= end_date)  # Check if filter was called with the correct arguments
+
+
+def test_get_filtered_date_bill_weights_ordered(Project):
+    # Prepare mock data
+    start_date = '2024-01-01'
+    end_date = '2024-12-31'
+
+
+    Project.get_bill_weights_ordered.return_value = Mock()
+    Project.filter_by_date.return_value = Mock()
+
+    # Call the method to test
+    result = Project.get_filtered_date_bill_weights_ordered(start_date, end_date)
+
+    # Assertions
+    assert result == Project.filter_by_date.return_value  # Check if the method returns the expected result
+    Project.filter_by_date.assert_called_once_with(
+        Project.get_bill_weights_ordered.return_value, start_date,
+        end_date)  # Check if filter_by_date was called with the correct arguments
diff --git a/ihatemoney/web.py b/ihatemoney/web.py
index 7263793b..4ee71385 100644
--- a/ihatemoney/web.py
+++ b/ihatemoney/web.py
@@ -130,8 +130,8 @@ def set_show_admin_dashboard_link(endpoint, values):
     """
 
     g.show_admin_dashboard_link = (
-        current_app.config["ACTIVATE_ADMIN_DASHBOARD"]
-        and current_app.config["ADMIN_PASSWORD"]
+            current_app.config["ACTIVATE_ADMIN_DASHBOARD"]
+            and current_app.config["ADMIN_PASSWORD"]
     )
     g.logout_form = LogoutForm()
 
@@ -199,7 +199,7 @@ def admin():
     if request.method == "POST" and form.validate():
         # Valid password
         if check_password_hash(
-            current_app.config["ADMIN_PASSWORD"], form.admin_password.data
+                current_app.config["ADMIN_PASSWORD"], form.admin_password.data
         ):
             session["is_admin"] = True
             session.update()
@@ -658,28 +658,31 @@ def list_bills():
         if "last_selected_payer" in session:
             bill_form.payer.data = session["last_selected_payer"]
     if (
-        "last_selected_payed_for" in session
-        and g.project.id in session["last_selected_payed_for"]
+            "last_selected_payed_for" in session
+            and g.project.id in session["last_selected_payed_for"]
     ):
         bill_form.payed_for.data = session["last_selected_payed_for"][g.project.id]
 
     # Each item will be a (weight_sum, Bill) tuple.
     # TODO: improve this awkward result using column_property:
     # https://docs.sqlalchemy.org/en/14/orm/mapped_sql_expr.html.
+
     if request.method == "GET":
+        # Retrieve ordered bill weights for the project
         weighted_bills = g.project.get_bill_weights_ordered().paginate(
             per_page=100, error_out=True
         )
     elif request.method == "POST":
         # Retrieve start_date and end_date from form data
-        start_date = request.form.get('start_date')
-        end_date = request.form.get('end_date')
+        start = request.form.get('start')
+        end = request.form.get('end')
 
-
-        weighted_bills = g.project.get_filtered_date_bill_weights_ordered(start_date, end_date).paginate(
+        # Retrieve filtered bill weights by date
+        weighted_bills = g.project.get_filtered_date_bill_weights_ordered(start, end).paginate(
             per_page=100, error_out=True
         )
 
+    # Render the template with the appropriate data
     return render_template(
         "list_bills.html",
         bills=weighted_bills,
@@ -688,8 +691,8 @@ def list_bills():
         csrf_form=csrf_form,
         add_bill=request.values.get("add_bill", False),
         current_view="list_bills",
-        start_date=start_date if request.method == "POST" else None,
-        end_date=end_date if request.method == "POST" else None,
+        start=start if request.method == "POST" else None,
+        end=end if request.method == "POST" else None,
     )
 
 @main.route("/<project_id>/members/add", methods=["GET", "POST"])
@@ -985,8 +988,8 @@ def feed(token):
         return "", 304
 
     if (
-        request.if_modified_since
-        and request.if_modified_since.replace(tzinfo=None) >= last_modified
+            request.if_modified_since
+            and request.if_modified_since.replace(tzinfo=None) >= last_modified
     ):
         return "", 304