The previous post is incorrect. There is no such presumption under Minnesota's custody or parenting time statutes. Under Minnesota Statutes 518.175, it is stated that there exists a rebuttable presumption for a "minimum" schedule of parenting time. It states, specifically - "In the absence of other evidence, there is a rebuttable presumption that a parent is entitled to receive at least 25 percent of the parenting time for the child."
Moreover, parenting time schedules may be modified if there has been a substantial change in circumstance since the last parenting time order and the change is deemed to be in the child's best interests. As a result, any arguments for a change in parenting time would have to revolve around that particular standard.