doesn't even blow out the candles, is on the verge of crying on each of his birthdays. "What if I don't want to grow up????" Throws the best birthday parties for his mates tho.
Wants the exact number of candles on his birthday cake. If he's turning 24, Merlin forbid you come with a cake that has 23 candles on it. Once locked himself in a broom cupboard because his cake had 16 candles instead of 15. For someone who didn't get to celebrate his birthday until he was 12, he is way too picky.
Doesn't want any fuss, he didn't tell the Marauders his birthday until like 3rd year. At one point Peter was like "we never celebrated Remus' birthday" and James lost.his.shit. Needless to say his next birthday was a big thing that ended in detention for James and Sirius. Shocker.
Eats the whole cake, that's all he wants. Loves it when Marauders make a big deal out of his birthday. On his birthday Sirius usually wants to punch him because he gets so spoiled but James loves it and spoils him even further. Loves big parties.