How long does baby have to face rear in car seat?

Babies should face rear in their car seat for as long as possible, typically until they reach the maximum weight or height limit set by the car seat manufacturer, which is often around 2 years old. The American Academy of Pediatrics recommends keeping children in a rear-facing seat until they outgrow it, as this position provides optimal safety for their developing neck and spine. Always check the specific guidelines of your car seat for the best practices.