Diem may refer to several different people or phrases: · Ngo Dinh Diem was a Vietnamese leader who was assassinated in a CIA supported coup in 1963. · Ryan Diem, player in the NFL · Carl Diem, originator of the Olympic torch relay Diem translates to "day" in Latin and is used in several phrases: · Carpe diem, a Latin phrase meaning "seize the day" · Per diem, meaning "per day" · De die in diem, meaning "from day to day" · Carpe Diem is also the name of a comic DiemDiemDiem