St Patrick’s Day brought bagpipes, drums, and plenty of Irish pride to the streets of American cities like Boston and New York City. Meanwhile, over the weekend the Chicago River was dyed a bright emerald green, a tradition that begun in 1962. Organised by local plumbers, the eco-friendly, secret-formula powder turned the water green for several hours.

President Donald Trump took part in St Patrick’s Day festivities himself, hosting Irish Taoiseach Michael Martin in the Oval Office.