"Starting in Month 3 or 4 (or whenever he holds his head up well and seems interested), he may be ready to start sitting upright."
What other signs should you look out for?
Sit Up Basics: When Do Babies Sit Up? | What to Expect
When your baby starts to hold his head up well, encourage him to sit up on his own. Know the basics, like when you can expect your baby to sit up, with help from What To Expect.whattoexpect.com DorrisWedding tea and calf length wears for a formal occasion