The organization accused the state government of launching an "aggressive backdoor policy" to usurp tribal land through the New Land Use Policy of Manipur, 2014, introduction of village development committees and appointment of revenue tribunals.
There will, however, be no restriction on observing the day, said UNC, a conglomeration of various Naga civil bodies of the state.
To press the Centre on granting Alternative Arrangement (AA) for Manipur's Nagas, UNC has already conducted various meetings and campaigns in the state's Naga Areas.