Feb 13, 2013 He's a Toddler? Last week I found out that my son is a toddler and was no longer an infant. I somehow missed the chapter that states a one year old is the cut off date of being an infant. My son is almost 16 months, so for the past 4 months I have been telling people I have a baby. :) I guess I need to step up my role in being a dad so that I don't embarrass the little man in the future.