Page not found (404)

Request Method: GET
Request URL: http://zab-cultura.ru/events/elena-belkevich-samchuk-sopranos-programmoj-shedevry-vokalnyh-sochinenij-6/
Raised by: apps.events.views.EventDetailView

You're seeing this error because you have DEBUG = True in your Django settings file. Change that to False, and Django will display a standard 404 page.