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jubilee

In a sentence
Tento rok sa koná jubilejný desiaty ročník festivalu.
The festival celebrates its milestone tenth edition this year.
Jubilejný ročník festivalu bol vypredaný.
The festival's anniversary edition was sold out.
Škola oslavuje jubilejný päťdesiaty rok.
The school is celebrating its jubilee fiftieth year.
Jubilejný koncert slávil tridsať rokov kapely.
The jubilee concert celebrated thirty years of the band.
Source
Slovak National Corpus (SNK) ↗English gloss from the frequency publish path. Hand-reviewed example sentences.
Full attribution on References.