We discuss time - space symmetry in the processes of phase slippage in Josephson junctions and charge density wave (CDW) stacked junctions. In Josephson junctions phase slip by <$E 2 pi> occurs periodically in time with a period T above critical current with a frequency obeys Josephson relation. In CDW stacks at voltage on the stack above threshold value the CDW dislocation appears in the weakest junction of the stack. This phase dislocation corresponds to the local phase slippage by <$E 2 pi>. With voltage increase a new dislocations appear forming periodic array of dislocations with a period L. The inverse spacing 1/L follows the analog of Josephson equation.