N.H. Const. pt. 2, art. 50
The governor, with advice of council, shall have full power and authority, in the recess of the general court, to prorogue the same from time to time, not exceeding ninety days, in any one recess of said court; and during the sessions of said court, to adjourn or prorogue it to any time the two houses may desire, and to call it together sooner than the time to which it may be adjourned, or prorogued, if the welfare of the state should require the same.
June 2, 1784
Amended 1792 changing president to governor.