Staff from the Nwanyi FM station in the Zambezi region commemorated the day with former staff members and members of the public.
Veteran studio producer Martin Mombela, who started with NBC in 1991 when it was still called SWABC, said through the transition, the radio's impact grew in the community.
He added that the radio's listenership extends to neighbouring countries such as Angola, Zambia and Botswana.
"In making sure that we bring programmes that have got good content on them because, you see, our neighbouring countries, they have also got their radio stations nearby, meaning that it's a competition. So I would like, or it's my wish to all of you who are broadcasters, to make sure that you do research before you come on air and so on."
Former Chief News Reporter Sililo Mubiana, who served at the national broadcaster for 18 years, said the celebration is vital as the broadcaster has stood to always unite communities.
"NBC does not discriminate; it is a corporation that caters to the young people, the elderly, the fishermen, the cattle herders and everyone else. Why am I saying so? Because we are the only corporation in this country that broadcasts in more than 9 languages."
Mubiana added that the broadcaster has had technological advancements that help enable information to disseminate faster, yet still verifies the information before publication.
"From the time that I joined NBC in 2005, we have seen significant changes to NBC. We have seen improvements since we came here; when I was transferred to Katima as a region to come and head the news department, we were using tapes. We record in the field; we come and take soundbites – I mean, time codes for the soundbites and time codes for the visuals that we want the producers in Windhoek to use – but today, 35 years after independence, we have transformed from analogue to digital."
Regional Manager Masialeti Mafale encouraged the staff to network and learn from their predecessors.
"Today I will put a face to the voice; some of the people here I just know by the voices that I listen to. I have never seen; I am seeing lots of new faces here. Some I have never seen, so it's a pleasure, and I am hoping the colleagues will also learn from others, and we are looking forward to tapping knowledge from our elders."