diff --git a/lib/service/notifications/scheduler.ex b/lib/service/notifications/scheduler.ex
index 872e70e82..f063a5969 100644
--- a/lib/service/notifications/scheduler.ex
+++ b/lib/service/notifications/scheduler.ex
@@ -144,11 +144,17 @@ defmodule Mobilizon.Service.Notifications.Scheduler do
 
   def weekly_notification(_), do: {:ok, nil}
 
-  def pending_participation_notification(%Event{
-        id: event_id,
-        organizer_actor_id: organizer_actor_id,
-        local: true
-      }) do
+  def pending_participation_notification(event, options \\ [])
+
+  def pending_participation_notification(
+        %Event{
+          id: event_id,
+          organizer_actor_id: organizer_actor_id,
+          local: true,
+          begins_on: begins_on
+        },
+        options
+      ) do
     with %Actor{user_id: user_id} when not is_nil(user_id) <-
            Actors.get_actor(organizer_actor_id),
          %User{
@@ -158,28 +164,14 @@ defmodule Mobilizon.Service.Notifications.Scheduler do
              timezone: timezone
            }
          } <- Users.get_user_with_settings!(user_id) do
+      compare_to = Keyword.get(options, :compare_to, DateTime.utc_now())
+
       send_at =
-        case notification_pending_participation do
-          :none ->
-            nil
-
-          :direct ->
-            :direct
-
-          :one_day ->
-            calculate_next_day_notification(Date.utc_today(), timezone: timezone)
-
-          :one_week ->
-            calculate_next_week_notification(DateTime.utc_now(),
-              timezone: timezone,
-              locale: locale
-            )
-
-          :one_hour ->
-            DateTime.utc_now()
-            |> DateTime.shift_zone!(timezone)
-            |> (&%{&1 | minute: 0, second: 0, microsecond: {0, 0}}).()
-        end
+        determine_send_at(notification_pending_participation, begins_on,
+          compare_to: compare_to,
+          timezone: timezone,
+          locale: locale
+        )
 
       params = %{
         user_id: user_id,
@@ -196,15 +188,18 @@ defmodule Mobilizon.Service.Notifications.Scheduler do
           {:ok, nil}
 
         # Sending to calculated time
-        true ->
+        DateTime.compare(begins_on, send_at) == :gt ->
           Notification.enqueue(:pending_participation_notification, params, scheduled_at: send_at)
+
+        true ->
+          {:ok, nil}
       end
     else
       _ -> {:ok, nil}
     end
   end
 
-  def pending_participation_notification(_), do: {:ok, nil}
+  def pending_participation_notification(_, _), do: {:ok, nil}
 
   def pending_membership_notification(%Actor{type: :Group, id: group_id}) do
     group_id
@@ -275,4 +270,36 @@ defmodule Mobilizon.Service.Notifications.Scheduler do
         Notification.enqueue(:pending_membership_notification, params, scheduled_at: send_at)
     end
   end
+
+  defp determine_send_at(notification_pending_participation, begins_on, options) do
+    timezone = Keyword.get(options, :timezone, "Etc/UTC")
+    locale = Keyword.get(options, :locale, "en")
+    compare_to = Keyword.get(options, :compare_to, DateTime.utc_now())
+
+    case notification_pending_participation do
+      :none ->
+        nil
+
+      :direct ->
+        :direct
+
+      :one_day ->
+        calculate_next_day_notification(DateTime.to_date(compare_to),
+          timezone: timezone,
+          compare_to: compare_to
+        )
+
+      :one_week ->
+        calculate_next_week_notification(begins_on,
+          timezone: timezone,
+          locale: locale,
+          compare_to: compare_to
+        )
+
+      :one_hour ->
+        compare_to
+        |> DateTime.shift_zone!(timezone)
+        |> (&%{&1 | minute: 0, second: 0, microsecond: {0, 0}}).()
+    end
+  end
 end
diff --git a/test/service/notifications/scheduler_test.exs b/test/service/notifications/scheduler_test.exs
index 60b7e05ef..067eeac3d 100644
--- a/test/service/notifications/scheduler_test.exs
+++ b/test/service/notifications/scheduler_test.exs
@@ -238,32 +238,46 @@ defmodule Mobilizon.Service.Notifications.SchedulerTest do
       user = Map.put(user, :settings, settings)
       actor = insert(:actor, user: user)
 
-      # Make sure event happens next week
-      %Date{} = event_day = Date.utc_today() |> Date.add(3)
-      {:ok, %NaiveDateTime{} = event_date} = event_day |> NaiveDateTime.new(~T[16:00:00])
-      {:ok, begins_on} = DateTime.from_naive(event_date, "Etc/UTC")
-
-      %Event{} = event = insert(:event, begins_on: begins_on, local: true, organizer_actor: actor)
+      %Event{} =
+        event =
+        insert(:event, begins_on: ~U[2021-06-26 12:00:00Z], local: true, organizer_actor: actor)
 
       %Participant{} = _participant = insert(:participant, event: event, role: :not_approved)
 
-      Scheduler.pending_participation_notification(event)
-
-      now = Time.utc_now()
-
-      {:ok, scheduled_at} =
-        if now.hour <= 18 do
-          NaiveDateTime.new(Date.utc_today(), ~T[18:00:00])
-        else
-          Date.utc_today() |> Date.add(1) |> NaiveDateTime.new(~T[18:00:00])
-        end
-
-      {:ok, scheduled_at} = DateTime.from_naive(scheduled_at, "Europe/Paris")
+      Scheduler.pending_participation_notification(event, compare_to: ~U[2021-06-25 07:00:00Z])
 
       assert_enqueued(
         worker: Notification,
         args: %{user_id: user_id, event_id: event.id, op: :pending_participation_notification},
-        scheduled_at: scheduled_at
+        scheduled_at: ~U[2021-06-25 16:00:00Z]
+      )
+    end
+
+    test "if the notification date is passed" do
+      %User{id: user_id} = user = insert(:user, locale: "fr")
+
+      settings =
+        insert(:settings,
+          user_id: user_id,
+          notification_pending_participation: :one_day,
+          timezone: "Europe/Paris"
+        )
+
+      user = Map.put(user, :settings, settings)
+      actor = insert(:actor, user: user)
+
+      %Event{} =
+        event =
+        insert(:event, begins_on: ~U[2021-06-26 12:00:00Z], local: true, organizer_actor: actor)
+
+      %Participant{} = _participant = insert(:participant, event: event, role: :not_approved)
+
+      Scheduler.pending_participation_notification(event, compare_to: ~U[2021-06-26 07:00:00Z])
+
+      refute_enqueued(
+        worker: Notification,
+        args: %{user_id: user_id, event_id: event.id, op: :pending_participation_notification},
+        scheduled_at: ~U[2021-06-25 16:00:00Z]
       )
     end