Buddhist Era converter.

How the conversion works

For modern civil dates, the Thai Buddhist Era year is the Gregorian year plus 543. For example, Gregorian 2026 is Buddhist Era 2569. The month and day stay the same, and the tool validates the resulting Gregorian date so impossible dates such as 29 February in a common year are rejected.

Source and scope

The Royal Institute of Thailand documents the permanent adoption of the Buddhist Era, while Unicode CLDR defines localized Buddhist-calendar date formatting. Sources checked 29 September 2026.

This is a modern civil-year converter, not a Thai lunar-calendar or historical-era converter. Calculations remain on your device.