Netball New Zealand's head of events, Kate Agnew, said it was exciting to confirm the dates and venues for the two new tournaments.
"We're really looking forward to watching these new tournaments unfold," she said.
"We're excited about what this will do to our netball landscape in terms of the number of athletes who are now able to compete at a national event, who previously may not have."
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"And it's not just the players who are representing their centres who have been given these new opportunities, but also the coaches and officials who will also be taking part."
Netball New Zealand 2020 Domestic Events Calendar
2020 Netball NZ U18 Championships
July 13-16
Rotorua Netball Centre
2020 Netball NZ Open Champs
September 8-12
Central Energy Trust Arena, Palmerston North
2020 Fuji Xerox NZ Secondary Schools Netball Champs
October 6-9
Te Rauparaha Arena, Porirua