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The commemoration took place twice every year (in spring and in autumn). During the feast the ancient Slavs organized libations and ritual meals. In local mythologies such feasts were organized both for the living and for the souls of the forefathers who joined the dziady after dark.
In Belarus, Dziady (Дзяды) usually took place on the last Saturday before St. Dmitry's day, at the end of October/beginning of November (Dźmitreuskija dziady, St. Dmitry's Dziady). There were also Trinity Day Dziady, Shrovetide Dziady, and some other dates. Today, it is celebrated on November 2. 
In 1988 the newly founded Belarusian Popular Front (BPF) initiated the revival of the tradition in Belarus. In addition, on this day a rally to Kurapaty on the outskirts of Minsk is arranged, in the memory of the victims of Soviet political repressions. The communist administration of the country at that time strongly opposed the initiative. The BPF and other movements in Belarus have continued the tradition.
Much of the second part of Adam Mickiewicz's verse drama Dziady (published in 1823) depicts the Dziady feast organized in what is now Belarus, and popular among Ruthenians and Lithuanians during the times of the Polish-Lithuanian Commonwealth.
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