Its Spring Bank holiday in the UK and Memorial Day in the US.
Markets are closed in those countries. Although the CME will offer limited hours for Globex. Its open now, for example, with equity index futures supported by Trump’s backing away from his June 1 imposition of 50% tariffs on the European Union, giving the bloc until July 9 to work a trade deal out
Reminder – UK and US holidays today, Monday, May 26, 2025 – markets closed