June 2019 (presumably): 1st Democratic Primary Debate (NBC News, MSNBC, Telemundo).

July 2019 (presumably): 2nd Democratic Primary Date (CNN).

Friday 6 March 2020: Confirmation of Automatic delegates of 764 Automatic Delegates.

The Automatic (unpledged party leader and elected official) delegates are assigned automatically by virtue of respective public or Party office. [Delegate Selection Rules 9.A.].

Monday 13 July - Thursday 16 July 2020: 48th Democratic National Convention, in TBD (On 16 June 2018, the DNC announced the date).

The 48th DEMOCRATIC NATIONAL CONVENTION will have a total of 4,532 delegate votes.

• Either, a majority of pledged delegate votes, 1,885 of 3,768, must support a single candidate on the first ballot, or a majority of all (pledged and automatic) delegate votes, 2,267 of 4,532, must support a single candidate on any ballot necessary in order for a Presidential candidate to be nominated.
• A majority of all (pledged and automatic) delegate votes, 2,267 of 4,532, is necessary in order for a Vice-Presidential candidate to be nominated.

"The rules for the 2020 Democratic National Convention specify a formula to be used in determining the allocation of delegate votes to each state and jurisdiction sending a delegation to the Convention. For the details see The Math Behind the Democratic Delegate Allocation.

The breakdown of the delegate votes is as follows:

• 3,278 Base delegate votes (2,437 district delegate votes and 841 at-large delegate votes)
• 490 Pledged PLEOs (meaning a total of 3,768 delegate votes to be determined by either a primary or a caucus/convention system in each state or other jurisdiction)
• 764 Automatic (Unpledged) delegate votes.
• TOTAL: 4,532 delegate votes.

There will actually be more delegates on the floor of the Democratic National Convention than there are delegate votes [which is why I use the term "delegate votes" in the first place]. Some jursidictions will have more delegate seats than actual delegate votes at that Convention [as a result of which, some delegates from some states will have to cast fractional votes during roll calls on the Convention floor]. There will be 4,532 delegate votes at the 47th Democratic National Convention, but there will be 4,536 actual delegates on the floor of the Convention (in other words, 4 more delegates than votes)... here's why:

• DEMOCRATS ABROAD, with 17 delegate votes, will have 21 delegates.
• 8 unpledged Democratic National Committee members each casts ½ vote for a total of 4 votes.

"In a relative handful of cases, a Member of Congress or a Governor is also a member of the Democratic National Committee (in some of these cases, such as that of the Democrats' Congressional Leaders- House Minority Leader Nancy Pelosi - Members of Congress are DNC members ex-officio; in other cases, however, they represent various associated committees or organizations affiliated with the DNC: for example, U.S. Senators sit on the DNC as representatives of the Democratic Senatorial Campaign Committee- likewise, Congressmen and Governors sit on the DNC as representatives of, respectively, the Democratic Congressional Campaign Committee and the Democratic Governors' Association); the Democratic Party lists these Unpledged PLEOs who are DNC members as well as holders of elective office solely as DNC members (in other words, as far as the Party is concerned, these people are "Party Leaders" more than "Elected Officials"). However, it is the considered opinion of "The Green Papers" that the average user of this web site is going to think of these few Unpledged PLEOs who are in the unique position of being both PLs AND EOs more in terms of their elected office than their DNC membership: as a result, "The Green Papers" has "converted" DNC members who happen also to be Governors, Senators and Representatives to their political office from their DNC membership. Therefore, the breakdown in each state or other jurisdiction of Unpledged PLEOs as posted on "The Green Papers" may differ somewhat from that put out by the Democratic Party itself: where this is the case, it is so indicated on the appropriate DEMOCRAT page for the affected state or other jurisdiction."

Terminology:

• PLEOs = Party Leaders and Elected Officials.
• Unpledged PLEOs = Superdelegates.
• District + at-large delegates = Base delegates.
• Base delegates + Pledged PLEOs are the only delegates chosen through a Democratic presidential Primary or Caucus/Convention procedure and, thus, allocated to presidential contenders.
• All Unpledged delegates (Unpledged PLEOs) are automatically uncommitted and are held aside rather than allocated to presidential contenders through a Primary or Caucus/Convention.