Blog Action Day, codenamed #bad09 by tech gurus and geeks, is an annual event that unites the world's bloggers in posting about the same issue on the same day.
Siku ya Blogu, alama za mtandao zinazobandikwa jina #bad09 na watetezi wa teknolojia na watu wa hali ya juu, ni tukio la kila mwaka linalowaunganisha wanablogu wa dunia katika kuweka kuhusu suala hilo siku hiyohiyo.