berapa kali mau repeat?
bodo longkang

In those days, people don't know how or where to register birth, so its common that some of them are registerd late. Meaning they have real birthday and official birthday (follow birth cert)

And u dont know in lunar calendars got leap month?

If follow chinese lunar calendar, my age is less than 16, because i was born in a leap month, that only exists once in a few years

you can read the picture first,then talk.