Straight from The Pits of Tartarus

Annabeth's birthday through the years.

This is set when Annabeth fills 14.

Happy birthday Annabeth. I hope you get a fantastic day (together with a certain son of Poseidon, if I am not wrong?), without any monster attacks. How is it going in Camp? Anything new about Kronos?

Okay, just ignore the last question, I was just curious. Don't worry about it today.

I would have loved to visit you, but I am pretty busy here with the hunt, and all that. It was pour luck I even found a shop! (I don't even think you can call it that).

Anyways, I hope I see you soon under peaceful circumstances.

--Love Thalia.

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This is  set when Annabeth fills 17.

Nine days.

As she fell...

Wait, isn't this the first sentence of House of Hades? Oh, now I know why! Annabeth was in Tartarus on her birthday! (What's up with demigods and sucky birthdays?) Rick have already written about this...let's just go on...

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Set on Annabeth's 18 birthday.

"Good morning Wise Girl."

"Seaweed Brain, what are you doing in my room?"

Annabeth's eyes were closed, but she still knew that Percy was frowning. "Can't I wake up my girlfriend on her birthday?"

"No. Not if you don't bring cake and sing her a birthday song." Annabeth teased.

"Well, I can do the last one. But I thought it wasn't fair over for you on your birthday." Percy stated.

"I agree. What's the clock?"

"Seven. Then we are sure on, that you're not going to be late in school. I thought you would like that."

She opened up her eyes, and saw Percy standing in the doorframe. Percy's hair was ruffled as always, and he was still wearing his PJ.

"You're right again Seaweed Brain. I think you broke a record."

Percy raised his eyebrow. "And what should that record be named then?"

She grinned. "Being right two times in a row with a Seaweed Brain."

Percy rolled his eyes. "Then you broke a record too."

"I always break the record."

"I think you are soon going to break another one." Percy said, while stepping closer, and closer on her.

"Which one?" She asked stupidly, even through she knew the answer.

Percy stopped walking. "The one who's named: Starving your poor boyfriend on your birthday."