Objective: To investigate if divorced parents celebrate their children's birthdays with their respective ex-partner and current partner, and whether they do so "jointly" with both. Background: Family rituals like birthday celebrations are important and meaningful events in people's lives, but little is known about who partakes in these in contemporary postdivorce families. Method: We assessed whether divorced parents celebrated their child's birthday together with their ex-partner (i.e., the child’s other biological parent), current partner (i.e., the child’s stepparent), and jointly with both. Dutch Data (N=2,451) was analyzed using linear probability models. Results: Most parents celebrated the child's birthday without the ex-partner, but...