
Holidaymakers take a dip in Lake Wānaka to cool off. PHOTO: KERRE WATERWORTH
The decision to add the macron was supported by Ngāi Tahu and now both the lake and town are officially spelt using a macron above the first a.
The change was one of the name amendments notified in the New Zealand Gazette on August 26.
A macron is written above a vowel to denote a long vowel sound.
The new spelling will now be used in all official documents, road signs, maps, websites and databases.