1. 1929- Gave woman the right to vote.
2. 1933- and changed the fixed days for the meeting of congress and time for the president's term of office.
3. 1933- ended the Prohibition law of the eighteenth amendment ,i.e., state can make laws how alcohol can be used in each state.
4. 1951- a person may not be elected as President for more than 2 times.