Final answer:
Nunavut became a territory on April 1st, 1999, separating from the Northwest Territories to become its own entity, predominantly home to the Inuit population.
Step-by-step explanation:
The date on which Nunavut became a territory is April 1st, 1999. This marked a significant change in Canada's territorial organization, as Nunavut officially broke from the Northwest Territory to become its own entity.
The creation of Nunavut was an important event in Canadian history, acknowledging the cultural uniqueness and rights of the Inuit population. The process of developing Nunavut’s own governmental structures was aimed at giving Inuit more control over their land and policy.
With a population of about 35,000, mostly consisting of Inuit, Nunavut encompasses about one-fifth of Canada’s land area, making it larger than any other province or territory.