There are characteristic gaps between these 2 cell-cycle events: G1 phase between mitosis and S phase, and G2 phase between S and M phases.
Three irreversible transitions control the normal mitotic cycle: 1/ Start, when the cell commits itself to cell division instead of choosing an alternative development like mating, 2/ G2/M transition, when the cell commits itself to enter into mitosis, and 3/ Finish, when the cell exits from mitosis (anaphase, telophase, cell division).