CTA. You might have noticed that when Thais talk about what year it is, the years are in the future. For example, the year we are on, 2025, in Thai year is 2568. (Year + 543 = Thai Year) To convert English (Gregorian calendar) year to Thai year (Buddhist Calendar): Add 543 years. Example: 2020 is 2563 in Thai years. 1999 was 2542 in Thai years. To convert Thai year to English year: Subtract 543 years. Example: Thai year 2563 is 2020 in English year. Thai year 2500 was 1957 in English (Gregorian calendar) years. Many people actually aren’t aware of the difference and get caught by surprise when they see this “future” year.