▁nine ▁or ▁more ▁that ▁signed . ▁It ▁would ▁not ▁cover ▁the ▁four ▁or ▁fewer ▁states ▁that ▁might ▁not ▁have ▁signed . ▁ ▁Cl osing ▁end ors ement ▁ ▁The ▁signing ▁of ▁the ▁United ▁States ▁Constitution ▁occurred ▁on ▁September ▁ 1 7 , ▁ 1 7 8 7 , ▁when ▁ 3 9 ▁deleg ates ▁to ▁the ▁Constitution al ▁Convention ▁end ors ed ▁the ▁constitution ▁created ▁during ▁the ▁convention . ▁In ▁addition ▁to ▁sign atures , ▁this ▁closing ▁end ors ement , ▁the ▁Constitution ' s ▁es chat oc ol , ▁included ▁a ▁brief ▁declaration ▁that ▁the ▁deleg ates ' ▁work ▁has ▁been ▁successfully ▁completed ▁and ▁that ▁those ▁whose ▁sign atures ▁appear ▁on ▁it ▁sub scribe ▁to ▁the ▁final ▁document . ▁In cluded ▁are ▁a ▁statement ▁pron oun cing ▁the ▁document ' s ▁ad option ▁by ▁the ▁states ▁present , ▁a ▁formula ic ▁d ating ▁of ▁its ▁ad option , ▁and ▁the ▁sign atures ▁of ▁those ▁end ors ing ▁it . ▁Additionally , ▁the ▁convention ' s ▁secretary , ▁William ▁Jackson , ▁added ▁a ▁note ▁to ▁verify ▁four ▁am end ments ▁made ▁by ▁hand ▁to ▁the ▁final ▁document , ▁and ▁signed ▁the ▁note ▁to ▁authentic ate ▁its ▁valid ity . ▁ ▁The ▁language ▁of ▁the ▁con cluding ▁end ors ement , ▁conce ived ▁by ▁G ouverneur ▁Morris ▁and ▁presented ▁to ▁the ▁convention ▁by ▁Benjamin ▁Franklin , ▁was ▁made ▁intention ally ▁ambigu ous ▁in ▁hopes ▁of ▁winning ▁over ▁the ▁votes ▁of ▁diss ent ing ▁deleg ates . ▁Adv oc ates ▁for ▁the ▁new ▁frame ▁of