What is the history of birthdays in Thailand? Can you help me calculate it? Date:1984.8.131999.8.15 China.

There are also solar calendars and Buddhist calendars. Two days on the ID card. 1984 is the Buddhist calendar 2527, and 1999 is the Buddhist calendar 2542. It's simple. Just add 543 to the solar calendar. Because the year of Sakyamuni's nirvana was 543 BC, which was the first year of the Buddhist calendar. This month is the same as ours.