Orthodox Holy Saturday in Serbia commemorates Jesus Christ laying in his tomb after his death. The eastern church uses the Julian calendar for many of its holidays and this is why Holy Saturday in Serbia is different from Holy Saturday in the Western Church nations.
People can attend special church service where holy communion can be received. Many churches will hold candles while the congregation sings.
The eastern Christian Church bases many of its holidays off the Julian calendar which puts Holy Saturday in the eastern church different from the western church using the Gregorian calendar.