Yes, bake the cake the day before and allow it to cool, then cut into bite-sized squares or cubes and store in an airtight container and place on the countertop until the next day. Macerate your strawberries for at least 30 minutes on your countertop; however, if macerating overnight, store in an airtight container and place in the fridge. If making the whipped cream from scratch, I suggest making it right before you’re ready to assemble the parfaits and before serving.