His dog has joined a long tradition in the Irvine family, with Jason and brother Brenden regulars at dawn services since they were old enough to remember - encouraged by their parents and their late grandfather Victor "Snapper" Wilson.
Mr Wilson, who died in 2006, served with the 24th Battalion in Italy during World War II, and told Mr Irvine about his friendship with the Gurkhas whose lethal skills with Nepal's distinctive kukri knife earned them a fearsome reputation equalled only by the Maori Battalion's use of the bayonet.
And like his grandfather, Mr Irvine is a fulltime member of the Tauranga RSA, enjoying the services offered by the club which has unhesitatingly accepted Olive into its ranks.