when is the first presidential debate between Kamala Harris and Donald Trump here's what to know we are officially a day away from the first presidential debate between former president Donald Trump and vice president Kamala Harris a BC News announced last month the first debate will take place in Philadelphia at the national constitutional Center on Tuesday September the 10th 2024 Trump announced in a post on Truth social that he had accepted the set 10 debate on a BC under the same conditions as the June CNN debate against Biden the rules for the last debate meant that each candidate's microphone was only turned on when it was their turn to speak there was no studio audience and the candidates weren't allowed to talk to their staff during breaks or bring any notes with them both candidates were provided with only a pen and pad and a bottle of water