Can baby laugh when he is only 12 days old?

Im kind of like cant believe it myself when I heard my baby laughing. I just fed him and he fell asleep. Shortly, he smiled and “hahaha” softly! My hubby heard it too!

I went to google about it and it wrote that baby only know how to know when they are about 1 month old. Hmmm... Something to ponder about. Maybe Kristoff is way smarter. Haha!