*Topic moved to 'Help for New Tamagotchi Pet Owners'*
Congrats on getting an iD L! After hatching, the baby stage lasts an hour, after which your character will evolve into a toddler. It'll take 24 hours from the time of hatch for it to evolve from a toddler into a teen, and yet another 24 hours after that to evolve from a teen into an adult. All characters earn their final happy symbol 48 hours after being an adult. This is also about the time when your adult can visit the matchmaker. I think that about covers the stages in a nutshell.