üç yılda bir olan

listen to the pronunciation of üç yılda bir olan
Türkçe - İngilizce
triennial
Lasting for three years
{a} lasting or being every three years
taking place every third year
happening every three years annual (triennis, from triennium , from tri- + annus )
Happening, coming about, or appearing once in every three years; as, triennial elections; a triennial catalogue; a triennial visitation
{i} event occurring every three years; three year period; three year anniversary
occurring every third year or lasting 3 years
happening every three years
A third anniversary
Something which takes place or appears once in three years
{s} occurring every three years; consisting of three years
Continuing three years; as, triennial parliaments; a triennial reign
the 300th anniversary (or the celebration of it)