In a series of tweets, PM Modi said, "Statehood Day greetings to the people of Meghalaya. My best wishes for the development journey of the state."
"On their Statehood Day, I convey my best wishes to the people of Tripura and pray for the state's all-round growth.
"Greetings to the people of Manipur on their Statehood Day. I hope Manipur will remain blessed with joy and prosperity," Modi said.
Under the North-Eastern Areas (Re-organisation) Act, 1971, Tripura, Manipur and Meghalaya attained statehood on January 21, 1972.