How does a blended family's parenting plan handle holidays claimed by two different sets of grandparents?

There's no fixed legal formula for allocating holiday time among multiple sets of grandparents in a blended family - this is generally addressed through the parents' own parenting plan, since decisions about how a child spends specific holidays fall within whichever parent has parenting time or decision-making authority for that period, not through a separate right belonging to grandparents themselves. A well-drafted plan typically sets out which parent has the child for which holidays, often alternating year to year, and leaves it to each parent to decide how to share that time with their own side of the family, including multiple sets of grandparents if that parent has remarried or repartnered.

Where real friction exists - for example, a parent wanting to divide a single holiday between two sets of grandparents in ways that feel disruptive to the child - it's often more practical to build in some flexibility, such as alternating which grandparents get priority in a given year, rather than trying to specify a rigid schedule for every possible combination. Courts generally won't get involved in this level of detail unless it becomes a genuine best-interests dispute between the parents themselves. A family mediator can often help blended families work through these logistics more efficiently than returning to court.