Subbotnik and voskresnik (from Russian: суббо́та, IPA: [sʊˈbotə] for "Saturday" and воскресе́нье, IPA: [vəskrʲɪˈsʲenʲjɪ] for "Sunday") were days of volunteer unpaid work on weekends after the October Revolution, ...
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though the word itself is derived from суббо́та (subbota for Saturday) and the common Russian suffix -ник (-nik).
The tradition is continued in modern Russia and some other former Soviet Republics.[failed verification] Subbotniks are mostly organized for cleaning the streets of garbage, fixing public amenities, collecting recyclable material, and other community services.