平成12年 (Heisei 12) is 2000 in the Western calendar. Check the age and zodiac below.
Yes. Heisei 12 (平成12年 in Japanese) corresponds to 2000 in the Western calendar.
2000 is the Year of the Dragon (辰（たつ） in Japanese) in the 12-year zodiac cycle. In the older 60-year sexagenary cycle (kanshi) it is 庚辰.
It depends on whether they have had their birthday yet this year. The box near the top of this page calculates both possible ages automatically from today's date — the lower number is their age before their birthday, the higher number is their age after.
Heisei 12 is written 平成12年 in Japanese. It is also commonly abbreviated H12 — for example on driver's licenses and other government forms.
