"Let us renew our shared resolve to prevent future atrocities from occurring anywhere in the world.
Biden's predecessors in the White House had stopped short of using the word, wary of damaging ties with a key regional ally.
Turkish President Recep Tayyip Erdoğan on Saturday offered condolences to "Ottoman Armenians, who lost their lives under the difficult circumstances of World War I."
That message to Patriarch of Turkish Armenians Sahak Mashalian echoed Erdoğan's previous statements on April 24 and came before Biden's declaration.
April 24, known as Red Sunday, is commemorated as Genocide Remembrance Day by Armenians around the world.
In 2019, the House and Senate passed a resolution recognizing the mass killings of Armenians from 1915 to 1923 as genocide.
A group of more than 100 Republican and Democratic lawmakers wrote a letter to Biden this month calling on him to formally recognize the Armenian genocide. »