The proposed privately-backed NZ20 competition will be readjusted for a 2028 launch instead, NZ Cricket confirmed.
Organisers have pushed back the launch by a full year, abandoning plans to mark out their run-up in January 2027.
NZ20 establishment committee chair Don Mackinnon says it's a shared decision between the organisation and NZ Cricket - and it's important to get things right.
"Unfortunately, the window that we've got for January '27 is just too tight, particularly with the other commitments that we've locked in for test cricket. So it makes good sense."
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