"Shabbat" is a widely noted hallmark of Jewish peoples. Subbotniks (literally, Sabbatarians) are a Russian sect, categorized as either Jews or Judaizing Christians, that became particularly branded by strict "Shabbat" observance; (Hungarian-born radical Reform leader Ignaz Einhorn even shifted his congregation's "Shabbat" worship to Sundays.) Several weekly "Shabbat"s per year are designated as Special Sabbaths, such as "Shabbat haGadol", prior to Pesach (literally, "the High Sabbath", but not to be confused with other High Sabbaths); and "Shabbat Teshuvah", prior to Yom Kippur ("Repentance Sabbath").