Events that occurred on 17 March.
 On Earth
- 1960 - Jef Murray is born.
- 1968 - Author Nataša Tučev is born.
- 1989 - Actress Morfydd Clark is born.
- 2006 - Voice actor Bob Papenbrook dies.
- 2009 - The Lord of the Rings Online: Mines of Moria, "Leaves of Lórien" is released.
- 2010 - The Lord of the Rings: War in the North is announced for release in 2011.
 In Arda
- T.A. 2510:
- T.A. 3019: