Former vice-president and Democratic presidential nominee Joe Biden accepts the Democratic Party nomination for US president during the last day of the Democratic National Convention, being held virtually amid the novel coronavirus pandemic, at the Chase Center in Wilmington, Delaware on August 20, 2020. (Photo: AFP)

US Democrat Joe Biden on Thursday accepted his party's nomination for president, telling the nation he will draw on the best of America and "overcome this season of darkness" if he is elected over rival Donald Trump.

"It is with great honor and humility I accept this nomination for president of the United States of America," the former vice president and said on the closing night of the Democratic National Convention.

"And make no mistake, united we can and will overcome this season of darkness in America," he added.