Mostly Bc His Missions - He Sometimes Will Just Have To Go For Somekind Of Mission In The Time Of Private's Birthday - Tumblr Posts
Not sure how much time has actually passed between the Penguins of Madagascar movie and tv show, but I just want to point out that by season two of the tv show Private is at least 12 years old. He has his 10th birthday in the Penguins movie, another birthday in the Penguins of Madagascar comics, and yet another birthday in The Penguins of Madagascar comics (yes there's a distinction in titles with and without the "the").
It's also really sweet how Skipper grows as a penguin and tries his hardest with each passing year to make Private's birthday great. We see in the Penguins movie that he doesn't really pay attention to all that Private wants, yet he still tries to make an effort and goes as far as breaking into Fort Knox to try to make Private happy.
Then in the Penguins of Madagascar comics he tries to actually do stuff that Private would enjoy, such as making a cake and throwing a birthday party, all of which he tries to make perfect and keep as a surprise.
Later still, in The Penguins of Madagascar comics, he finally gets on his A game in terms of birthday parties and gathers the whole zoo together to throw Private a party.