I started at 5 months since I was going huge we have a big family so it was about 180 people everything came out perfect tho. Plus if you wanna get into detail you can start buying things like I'm already planning my daughters first bday

My Son Is 9-Months And His 1st Birthday Is In June . I Started Planning Now Since Its Close And Time Been Flying So Everything Is Almost Prepared For Him

I started at 6 months because some people actually needed that much of a notice. Plus that way I was able to buy a little over time

I started looking at themes when he was about 8 months old. I have everything ready to go now just have to wait until June.