March 6: Precinct Caucuses

March 24: Arapahoe Democratic Assembly, Hinkley High School, Aurora

April 7: Congressional District 6 Assembly, Cherry Creek High School, Greenwood Village

April 11: Congressional District 1 Assembly, South High School, Denver

April 13: Judicial District 18 Assembly, Pueblo

April 14: Colorado Democratic Assembly, State Fairgrounds, Pueblo

May 29: Last day to register to vote for Primary Election

June 4: County clerk begins mailing ballots for primary election

June 26: Primary Election (mail ballot only in Arapahoe County)

September 3: Democratic National Convention, Charlotte, NC

October 9: Last day to register to vote for General Election

October 22 - November 2: Early voting for General Election

November 6: ELECTION DAY