Electoral College Timeline of Events | National Archives

Under the 23rd Amendment of the Constitution, the District of Columbia is allocated three electors and treated like a State for purposes of the Electoral College. For this reason, in the following discussion, the word “State” also refers to the District of Columbia and the word “Governor” also refers to the Mayor of the District of Columbia. November 3, 2020—Election Day (first …

https://www.archives.gov/electoral-college/key-dates