Friday the 13th.
Cessna T182T Skylane TC N19CM is c/n T18209020 as listed with Redrock Aviation LLC out of Missoula, Montana. It arrived in Auckland back on 31-10-2019.
A long shot of another visitor from up north shows the Cirrus SR22 ZK-LDY (c/n 0895) of ZK-LDY Ltd of Paraparaumu.
Christchurch Helicopters 2001 Ltd Eurocopter EC 120 B ZK-HTV3 is c/n 1041 has been on line with them since February 2017.
Christchurch Helicopters 2001 Ltd's MD500N NOTAR ZK-HNV3 (c/n LN078) being buffed up following its registration change from ZK-IGA.