bicentennial

Etymology
and.

Adjective

 * 1) Relating to the 200th anniversary of an event or happening.
 * 2) Occurring every two hundred (200) years

Noun

 * 1) The 200th anniversary of an event or happening.
 * The US bicentennial in 1976 was celebrated greatly because the economy happened to be good.

Translations

 * German: Zweihundertjahrfeier, zweihundertster Jahrestag