The new hub features a kitchen and a training room.

The ceremony on Thursday afternoon featured entertainment from Oasis Wimmera and the Wimmera Filipino-Australian Club.

The organisation's chief executive Julie Pettett, a migrant from New Zealand, discussed how Harmony Day took on a increased significance for her in the wake of the Christchurch terror attacks.

"We wanted to provide a space that enabled food and social activities to be an opportunity to learn and grow and achieve their goals in the Wimmera," she told attendees.

"I've found the last week incredibly challenging: I have cried, I've spent many hours of reflection and really struggled with the enormity of what happened. But if nothing else comes of it, what can come of this is real change.

"There is change across New Zealand like I've never experienced in all my years of living there. I've spoken to family and friends there, and they say there are conversations happening between migrant communities and neighbours, leaders, everybody, about breaking down barriers."

"My little hope is maybe in the centre here we can do some of that too. Food is a wonderful social way for people to come together, eat together and celebrate our nations.

"Lets take this new opportunity here and make the most of it, try to bring about change."

The organisation's manager of learning and community development Robbie Millar said they wanted to offer more services to the community.

"We can use part of the training room in a variety of different ways. One might be for people who might need life skills in independent living or budgeting, another one would be for teaching hospitality and cooking," he said.

"We're planning to use the kitchen in a number of ways: A couple of our programs are building up some small micro-businesses and social enterprises, so the idea is we're going the register the kitchen so it can be used for that purpose as well."

Mr Millar said the centre was also in a partnership with Woodbine and Horsham Special school to open a cafe up the street.

"Our idea is to work with the migrant community in this kitchen to feed into that as well," he said.

Wotjobaluk woman Aunty Hazel McDonald of Dimboola welcomed the gathering to country.

Horsham Rural City Council Mayor Mark Radford said half of all Victorians were born overseas or had a parent who was born overseas.

"Cultural diversity provides opportunities, present us with challenges and give cause for celebration," he said.