Philippa and Truman Macarthy were outside Fabers Furnishings with their two little girls, 2-year-old Elena and Keira, 11 months. The family had come in from One Tree Point for the occasion.
"Anything that is community spirited makes you feel good and deserves to be supported," Mr Macarthy said. "It's a great day. I'm really proud that Whangarei has all this going on and the Kiwis and Samoa are playing up here today, too."
Nearby, brothers Theo,7, and 5-year old Flynn Redfern were all agog as the sirens and drums and cheering got closer. They'd come in from Mangapai for the parade and other festivities, but their big moment came when cousin Lauren went past with the roller skaters.
Many people in the crowd responded to the call to party like it was 1964 - hippies in kaftans, head bands and bell bottoms, rockers in tight trou, wide skirts and big hair, and good townsfolk in crimplene ensembles, twin sets, pearls, pillboxes and petals.
At the Town Basin, where morning parade morphed into midday party, an ebullient mayor Sheryl Mai addressed the crowd.
"You rock! Thank you to each and everyone of you who has made the effort to be here today, dress up or contribute in any way to our spectacular 50th anniversary grand parade and party," Ms Mai said.
She congratulated the event's organisers, in particular Lions Club stalwart Collin Twyman, "controller" of Grand Parade, who "could make the trains run on time".
In her speech Ms Mai spoke of the changes in 50 years, especially the central city's river setting.
'There was no loop walkway here, no restaurants or cafes, no museums, no galleries, no heritage panels and art works, no children's playground and no happy, busy social activity," Ms Mai said of the Town Basin.
"Across the road, our swimming pool was an outdoor facility, some buildings in the CBD didn't exist ... and there were no malls or one way streets in town."
She said the modern bridges that now define Whangarei's setting represent what the people and place have become in 50 years.
"Bridges will lead us into our future. Metaphorically speaking, it will be our ability to bridge divides and link together that could be the making of us."
Ms Mai said she was overwhelmed at the support the public showed for the celebration.
"[This] is the spirit that will propel our district forward over the next 50 years."