Is the birthday of people in Taiwan Province Province a lunar calendar or a solar calendar?

People in Taiwan Province Province celebrate their birthdays two or three times a year.

Birthdays are divided into national calendar (solar calendar), lunar calendar (lunar calendar) and birthdays on ID cards. Because in the past, when many people in rural areas wanted to register their births, they only remembered the lunar birthday, which was counted into the solar calendar by household administrators, and sometimes it was miscalculated, so there would be two solar birthdays.

However, most celebrities' public birthdays are based on the solar calendar.

So his birthday is the solar calendar, right?