Solar Calendar 阳历 vs Lunar Calendar 阴历

Oh my god~~~ I only knew yesterday what is solar calendar and lunar calendar !!!!!
I learned before in school days??? hmm... I not sure also~ or teachers never teach this before ??
我的天啊~ 我昨天才知道什么是阳历，什么是阴历！！！ 以前没有学过吗？我不确定。。。 还是，老师都没有教过？？

Yesterday 520, I sent a birthday message to a friend from China! Who knows, he replied me: 520 is in 'Yin Li' ~ but anyway, thanks for your wishes! I was like: what? 'Yin Li' & 'Yang Li' ?? what the hell is that ?? then... I asked him when his birthday in so called 'Yang Li' ? The answer is 3rd July !!!!
昨天，我发了一个生日的短讯给中国的朋友！谁知道，他竟然回复我：520是阴历吖~ 可是还是很谢谢你的祝福！ 我差点晕倒，什么阴历？什么阳历？ 结果，他说他的生日是在7月3日！！！！

I went to search what is 'Yin Li' and 'Yang Li'..... 'Yin Li' = lunar calendar! 'Yang Li' = solar calendar! Then... I just know how to differenciate ehh~ because of the word --> LUNAR
I am chinese educated but yet I do not know this! what a shame!! -_-"
我上网去找阴历和阳历~ 才知道它们的分别~ 因为LUNAR这个字，对我来说就是‘华人的日历’，哈哈哈， 乱来的啦！ 虽然是受华文教育的可是我连这个都不知道！ 丢脸耶~~~