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Request Method: GET
Request URL: http://naizn.ru/weblog/archive/%D1%81%D0%B2%D0%B0%D0%B4%D1%8C%D0%B1%D1%8B

No Tag found matching "свадьбы".

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.