Derek Day
| Olympic medal record | ||
|---|---|---|
| Men's field hockey | ||
| Representing United Kingdom | ||
| 1952 Helsinki | Team competition | |
Sir Derek Malcolm Day KCMG (29 November 1927 – 7 March 2015) was a British diplomat and field hockey player who competed in the 1952 Summer Olympics. He was educated at Hurstpierpoint College and St Catharine's College, Cambridge.