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anniversary
In a sentence
Je to ich výročie.
It's their anniversary.
Na výročie svadby sme išli do reštaurácie.
For our wedding anniversary we went to a restaurant.
Mesto oslavuje výročie založenia veľkým festivalom.
The town celebrates its founding anniversary with a big festival.
Škola si pripomína sté výročie otvorenia.
The school commemorates the hundredth anniversary of its opening.
Examples from Tatoeba (CC BY 2.0 FR).
Source
Slovak National Corpus (SNK) ↗English gloss from the frequency publish path. Includes Tatoeba example sentences when present.
Full attribution on References.