The date for the 2021 event has now been set for Saturday 27th February. 14:42 is low tide on that day. So you need to drop anchor at the sandbar off Motukiekie between mid-day to 1pm.
The 2020 event was cancelled due to weather considerations.
See the video below of the 2019 event.
Date: Saturday 5th January 2019
Low Tide: 2pm
Where: Sandbar off Motukiekie Island
Another brilliant day – see the video below: