If you agree that the concert should be a public event in NMH's calendar, you must send information to konsertinfo@nmh.no well in advance — and absolutely no later than two weeks before the concert.
Remember that pictures are an important part of the marketing – and remember to credit the photographer.
Even though the concert is in NMH's public concert calendar, it is often you who are responsible for the concert who can best promote it. Your own network and audience are probably also the most relevant audience for the concert. It is, therefore, important that you do what you can to promote the concert yourself.