When should I switch from a rear-facing to forward-facing car seat?
Don’t rush! To protect your child, keep them rear-facing for as long as possible, at least until age 2.
Children in the second year of life are five times less likely to die or be seriously injured in a crash if they ride in a rear-facing car seat. Turning a child under age 2 to a forward-facing position can result in head, neck or spinal cord injuries in the event of a crash. Babies under age 2 simply aren’t yet strong enough to withstand strong crash forces without the extra protection that a rear-facing car seat provides.
When your child outgrows their infant-only bucket seat, it’s time to use a convertible car seat – a seat that can be used in a rear-facing position, and when they’re older, in a forward-facing position.
Text source: http://safeseats4kids.aaa.com/faqs/when/when-should-i-switch-from-a-rear-facing-to-forward-facing-car-seat/