Commonwealth Covenant Day 2025, 2026 and 2027 in Northern Mariana Islands

Every 24 March is celebrated as Commonwealth Covenant Day in the Northern Mariana Islands (NMI) to remember the establishment of a commonwealth in union with the USA for NMI in 1976.

Year	Date	Day	Holiday
2025	24 Mar	Mon	Commonwealth Covenant Day
2026	24 Mar	Tue	Commonwealth Covenant Day
2027	24 Mar	Wed	Commonwealth Covenant Day
Please scroll down to end of page for previous years' dates.

What is now the Northern Mariana Islands became a colonial possession of Spain in the 1500’s, but the islands were acquired by the German Empire in 1899. After World War I, they were transferred to The Empire of Japan, and following World War II, they came under the control of the United States of America.

There was a movement to make Guam a part of NMI, but Guam decided against it and opted to remain a US territory. NMI then had to decide if they would seek full independence or continue some kind of relationship with the US.

In a 1975 referendum, around 80 percent of the population of NMI voted to approve a commonwealth covenant with the US rather than to become an independent nation. On 24 March the following year, the results of the referendum were put into effect.

Previous Years

Year	Date	Day	Holiday
2024	24 Mar	Sun	Commonwealth Covenant Day
	25 Mar	Mon	Commonwealth Covenant Day Holiday
2023	24 Mar	Fri	Commonwealth Covenant Day