Simplify the following text for a Grade 5 native English-speaking person.
Original: It was there , at 11.15 am on 5 December 1921 , that the decision was made to recommend the Treaty to the DÃ il Ã ireann ; the Treaty was finally signed by the delegates after further negotiations which closed at 02:20 on 6 December 1921 .
Simplified: Treaty was finally signed on 6 December 1921 .