« Reply #36 on: Sunday 22 March 20 20:50 GMT (UK) »
Doing a quick BDM search, it would appear that dates of birth start to show in the death indexes from the early 1970's. And of course only where the date of birth was known.

Minniehaha.
HAMMOND, Cainham/Caynham, Shropshire, U.K. Otago-NZ.
GALBRAITH, Ireland, Dunedin, Otago-NZ., Kensington-London, U.K.
GRANT, Sct., Dunedin, Otago-NZ., Vancouver, Canada.
GLASS, Aberdeenshire, Otago-NZ.
CAIRNEY/CARNEY/KEARNEY/Ireland, Airdrie, Scotland, Otago-NZ.
O'BRIEN Mary Ann, Limerick, Otago-NZ.
NICOL(L) James, Scotland, Otago-NZ.
SCOTT Thomas, Shetland, Otago-NZ.
MCHARDY/MCHARDIE Euphemia, Scotland, Otago-NZ.