President Trump is expected to deliver remarks at the 250th Anniversary of the U.S. Army Grand Military Parade and Celebration, an event he envisioned.

As a military parade rolls through Washington, DC, on Saturday – President Donald Trump’s birthday – millions of Americans are expected to protest in what organizers predict will be the strongest display of opposition to Trump’s administration since he took office in January.

Trump has long admired the British royal family and his big birthday parade in Washington is the same day as the U.K.’s annual Trooping the Color.