If it is something that lasts all year round, it should be conducted in both official languages, of course. But if it is a specific event... Yes, it is important to have both languages, I am not saying it is not. It would be better to do it in both languages as much as possible. However, I am not sure if it is reasonable to think that every village in the country has someone who speaks French.
On November 27th, 2012. See this statement in context.