How to say "Happy Birthday!" in Chinese:

Zhu4 ni3 de5 sheng1 ri4 kuai4 le4

What are these numbers? 

Zhu4 = wish
ni3 de5 = your
sheng1 ri4 = birthday
kuai4 le4 = happy

Here are a few good combinations to commit to memory:

sheng1 ri4 dan4 gao1 = Birthday cake
sheng1 ri4 ka3 = Birthday card
sheng1 ri4 la4 zhu2 = Birthday candle
sheng1 ri4 li3 wu4 = Birthday gift