Diem may refer to: Latin phrases , a Latin phrase meaning "seize the day" , meaning "per day" , a legal term meaning "from day to day" People Diem Brown (1980–2014), American television personality and journalist Carl Diem (1882–1962), originator of the Olympic torch relay Ngo Dinh Diem (1901–1963), Vietnamese leader assassinated in a military coup Ryan Diem (born 1979), American football player Other uses Diem (digital currency) (2019-2022), a digital currency formerly proposed by Facebook DiEM25, Democracy in Europe Movement 2025 Diem or Didam, a town in the Netherlands Surnames from given names