Context

• Prime Minister greeted the people of Arunachal Pradesh and Mizoram on their statehood day (20^th Feb 2020).
• Mizoram was previously part of Assam until 1972 when it was carved out as a Union Territory. 
• It became the 23rd state of India, a step above Union Territory, on February 20, 1987, with the Fifty-Third Amendment of the Indian Constitution. 
• Arunachal Pradesh which literally means ‘land of dawn-lit mountains’ is the Northeastern-most state of the country on the edge of the Himalayas. 
• It is the largest of the Seven Sister States of Northeast. Statehood day was conferred on Arunachal Pradesh on Feb 20, 1987.