Christmas wafer
Christmas wafer (Polish: opłatek [ɔˈpwatɛk] , plural opłatki; Lithuanian: kalėdaitis [kɐlʲeːˈdɐjtʲɪs], plural kalėdaičiai; Slovak: oblátka, plural oblátky) is a Catholic Christmas tradition celebrated in Poland, Lithuania, Moravia, and Slovakia. The custom is traditionally observed during Kūčios in Lithuania and Wigilia in Poland on December 24.