The Duke and Duchess of Sussex will begin their new life away from the UK royal family on 31 March, a spokeswoman for the couple has said.
Prince Harry and Meghan's office released an update about their plans and said the duke will retain the ranks of major, lieutenant commander and squadron leader.
The couple will announce details of their new non-profit organisation later this year.
A number of royal engagements were also announced with the prince due to attend an Invictus Games event next week.
The Invictus Games - an international adaptive multi-sport event for wounded, injured or sick armed services personnel - was created by Prince Harry.
It is understood the royal family is discussing with the duke and duchess the use of the word "royal" in their branding after they decided to start a new life in Canada.
The couple agreed last month with Prince Harry's grandmother, Queen Elizabeth, that they would no longer work as royals after their surprise announcement that they wanted to carve out "a progressive new role" which they hope to finance themselves.
The duke has spoken of his sadness at being forced to give up his royal duties, saying there was no other option if he and Meghan were to seek an independent future away from media intrusion.
Under the arrangement, Harry will remain a prince and the couple will keep their Duke and Duchess of Sussex titles as they begin a new life split between the UK and North America, where they will spend most of their time.
Read more:
Prince Harry starts new life with Meghan in Canada
Prince Harry speaks of 'great sadness' at leaving role
Harry, Meghan no longer working members of royal family
Additional reporting Reuters
