Thank you Gordon - a timeline for New Zealand is here:
https://covid19.govt.nz/about-our-covid-19-response/history-of-the-covid-19-alert-system/#timeline-of-key-events
28 February 2020
First COVID-19 case reported in New Zealand.
14 March 2020
The Government announces anyone entering New Zealand must self-isolate
for 14 days, except those arriving from the Pacific.
19 March 2020
All indoor gatherings of more than 100 people are to be cancelled.
Borders close to all but New Zealand citizens and permanent residents.
21 March 2020
The Government introduces the 4-tiered Alert Level system to help
combat COVID-19. The Prime Minister announces that New Zealand is at
Alert Level 2.
Mon 23 March 2020
At 1:30pm the Prime Minister announces New Zealand has moved to Alert
Level 3, effective immediately. In 48 hours, New Zealand will move to
Alert Level 4.
25 March 2020
At 11:59pm, New Zealand moves to Alert Level 4, and the entire nation
goes into self-isolation. A State of National Emergency is declared at
12:21pm.