diff --git a/lib/full_calendar/event.rb b/lib/full_calendar/event.rb
index 1d56c563109..ee1c5e37ab9 100644
--- a/lib/full_calendar/event.rb
+++ b/lib/full_calendar/event.rb
@@ -42,6 +42,11 @@ module FullCalendar
     attribute :url, :string
     attribute :class_names, array: true, default: []
 
+    # override in subclasses to add more fields to the JSON
+    def additional_attributes
+      {}
+    end
+
     def as_json
       {
         "id" => id,
@@ -51,26 +56,12 @@ module FullCalendar
         "end" => ends_at,
         "title" => title,
         "url" => url,
-        "classNames" => class_names,
-        "customEventView" => rendered_event_content
-      }.compact_blank.as_json
+        "classNames" => class_names
+      }.merge(additional_attributes).compact_blank.as_json
     end
 
     def to_json(*)
       as_json.to_json(*)
     end
-
-    def event_content_view_component
-      # override in subclasses
-      nil
-    end
-
-    private
-
-    def rendered_event_content
-      if event_content_view_component
-        ApplicationController.render(event_content_view_component, layout: false)
-      end
-    end
   end
 end
diff --git a/modules/costs/app/components/_index.sass b/modules/costs/app/components/_index.sass
index baf9ffc4943..c2d6cebea24 100644
--- a/modules/costs/app/components/_index.sass
+++ b/modules/costs/app/components/_index.sass
@@ -1,2 +1 @@
 @import "time_entries/entry_dialog_component"
-@import "time_tracking/time_entry_event_component"
diff --git a/modules/costs/app/components/time_tracking/time_entry_event_component.html.erb b/modules/costs/app/components/time_tracking/time_entry_event_component.html.erb
deleted file mode 100644
index 4879bc8cd2b..00000000000
--- a/modules/costs/app/components/time_tracking/time_entry_event_component.html.erb
+++ /dev/null
@@ -1,14 +0,0 @@
-<div class="calendar-time-entry-event--content">
-  <div class="calendar-time-entry-event-content-dates">
-    <%= link_to "edit", dialog_time_entry_path(time_entry, onlyMe: true), data: { "turbo-stream" => true } %>
-    <%= l(time_entry.spent_on) %>
-    <%- if time_entry.has_start_and_end_time? %>
-      <%= time_entry.start_timestamp.strftime("%H:%M") %>-<%= time_entry.end_timestamp.strftime("%H:%M") %>
-      (<%= time_entry.hours %>)
-    <%- else %>
-      <%= time_entry.hours %>)
-    <%- end %>
-  </div>
-  <div class="calendar-time-entry-event--content-subject-line"><%= time_entry.work_package.subject %></div>
-  <div class="calendar-time-entry-event--content-project-name"><%= time_entry.project.name %></div>
-</div>
diff --git a/modules/costs/app/components/time_tracking/time_entry_event_component.rb b/modules/costs/app/components/time_tracking/time_entry_event_component.rb
deleted file mode 100644
index fa5b74bfdf2..00000000000
--- a/modules/costs/app/components/time_tracking/time_entry_event_component.rb
+++ /dev/null
@@ -1,35 +0,0 @@
-# frozen_string_literal: true
-
-# -- copyright
-# OpenProject is an open source project management software.
-# Copyright (C) the OpenProject GmbH
-#
-# This program is free software; you can redistribute it and/or
-# modify it under the terms of the GNU General Public License version 3.
-#
-# OpenProject is a fork of ChiliProject, which is a fork of Redmine. The copyright follows:
-# Copyright (C) 2006-2013 Jean-Philippe Lang
-# Copyright (C) 2010-2013 the ChiliProject Team
-#
-# This program is free software; you can redistribute it and/or
-# modify it under the terms of the GNU General Public License
-# as published by the Free Software Foundation; either version 2
-# of the License, or (at your option) any later version.
-#
-# This program is distributed in the hope that it will be useful,
-# but WITHOUT ANY WARRANTY; without even the implied warranty of
-# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
-# GNU General Public License for more details.
-#
-# You should have received a copy of the GNU General Public License
-# along with this program; if not, write to the Free Software
-# Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301, USA.
-#
-# See COPYRIGHT and LICENSE files for more details.
-# ++
-
-module TimeTracking
-  class TimeEntryEventComponent < ApplicationComponent
-    options :time_entry
-  end
-end
diff --git a/modules/costs/app/components/time_tracking/time_entry_event_component.sass b/modules/costs/app/components/time_tracking/time_entry_event_component.sass
deleted file mode 100644
index 0ee491c93ef..00000000000
--- a/modules/costs/app/components/time_tracking/time_entry_event_component.sass
+++ /dev/null
@@ -1,66 +0,0 @@
-@import 'helpers'
-@import '../../app/spot/styles/sass/variables'
-
-.calendar-time-entry-event
-  display: flex
-  user-select: none
-  // Leave space for the shadow to be displayed
-  width: calc(100% - 4px)
-  border: 1px solid var(--borderColor-default)
-  border-radius: 5px
-  padding: 10px
-  position: relative
-  box-shadow: 1px 1px 3px 0px var(--borderColor-default)
-  background: var(--body-background)
-  color: var(--body-font-color)
-  font-size: var(--body-font-size)
-
-  &:hover
-    .calendar-time-entry-event--inline-buttons
-      opacity: 1
-      z-index: 2
-      box-shadow: -4px -4px 10px 4px var(--body-background)
-
-  &--content
-    display: grid
-    grid-template-columns: max-content max-content auto auto 1fr
-    grid-template-rows: auto 1fr max-content auto
-    grid-row-gap: 5px
-    grid-column-gap: 5px
-    grid-template-areas: "dates" "subject" "project"
-    overflow: hidden
-    flex-grow: 1
-    font-size: var(--body-font-size)
-    line-height: 16px
-
-    &-project-name
-      grid-area: project
-      font-style: italic
-      color: var(--fgColor-muted)
-      font-size: 12px
-      @include text-shortener
-
-    &-type
-      grid-area: type
-      margin-right: 4px
-
-    &-subject-line
-      grid-area: subject
-      @include text-shortener(false)
-
-    &-dates
-      grid-area: dates
-      place-self: center end
-      white-space: nowrap
-      color: var(--fgColor-muted)
-      font-size: 12px
-      color: var(--fgColor-muted)
-      margin: 0 8px
-
-  &--highlighting
-    width: 100%
-    height: 4px
-    position: absolute
-    top: 0
-    left: 0
-    border-radius: 5px 5px 0 0
diff --git a/modules/costs/lib/full_calendar/time_entry_event.rb b/modules/costs/lib/full_calendar/time_entry_event.rb
index ba404b22e61..72bac191a54 100644
--- a/modules/costs/lib/full_calendar/time_entry_event.rb
+++ b/modules/costs/lib/full_calendar/time_entry_event.rb
@@ -47,19 +47,15 @@ module FullCalendar
       end
     end
 
-    def as_json(*)
-      super.merge(
+    def additional_attributes
+      {
         hours: time_entry.hours,
         statusId: time_entry.work_package.status_id,
         workPackageId: time_entry.work_package.id,
         workPackageSubject: time_entry.work_package.subject,
         projectId: time_entry.project.id,
         projectName: time_entry.project.name
-      )
-    end
-
-    def event_content_view_component
-      TimeTracking::TimeEntryEventComponent.new(time_entry: time_entry)
+      }
     end
   end
 end