Why is the Buddhist Era offset +543 or +544 years?

The Buddhist Era commemorates the passing of Gautama Buddha in 543 BCE. Because the Khmer calendar year rolls over during the Visak Bochea full moon in May, the offset changes depending on whether the date is before or after May.

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Khmer Date & Buddhist Era (B.E.)

Accurately convert any Christian Calendar (AD) date to Cambodian Buddhist Era (BE / ព.ស.), discover your Khmer birth animal zodiac (ឆ្នាំទាំង ១២ ជូត-កុរ) and lunar era (ស័ក) with complete Khmer date formatting.

Select Gregorian Date (A.D.)

Complete Khmer Date Format

ថ្ងៃសៅរ៍ ទី៧ ខែវិច្ឆិកា ឆ្នាំ២០២៦ (ព.ស. ២៥៧០) ឆ្នាំមមី សំរឹទ្ធិស័ក

Buddhist Era (B.E.)

២៥៧០(2570)

AD year + 544 / 543

Khmer 12 Animal Zodiac

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ឆ្នាំមមីMomee (Horse)

Sak (10-Year Era Cycle)

សំរឹទ្ធិស័កSamriddhisak (ស័កទី 10)

Derived from Buddhist Era year

About & How It Works

Technical calculation logic, standards, and operational details

The Khmer Date Converter provides instantaneous, bidirectional date conversion between the Western Gregorian Calendar (Common Era / CE) and the traditional Cambodian Buddhist Era (ពុទ្ធសករាជ / B.E.). It calculates the traditional Khmer animal zodiac cycle (Chhnam / ឆ្នាំ), the ten-stem numerical cycle (Sak / ស័ក), and generates authentic formal Khmer date strings used in royal decrees and governmental proclamations.

Algorithmic Logic & Calculation

The converter applies the astronomical Cambodian offset formula (+543 / +544 years relative to the Common Era) and resolves the 60-year sexagenary cycle by calculating the modulo-12 animal zodiac (Rat, Ox, Tiger, Rabbit, Dragon, Snake, Horse, Goat, Monkey, Rooster, Dog, Pig) and modulo-10 Sak stems (Eksak to Samriddhisak).

Technical Standards & Compliance

Follows traditional Cambodian Buddhist Era calculations endorsed by the Ministry of Cults and Religions and National Committee for Organizing National and International Festivals.

Key Features & Capabilities

Gregorian to Buddhist Era (B.E.)

Converts any modern calendar date into the accurate Buddhist year.

12 Animal Zodiac Calculator

Computes the authentic Khmer zodiac animal associated with any birth year.

10 Sak Stem Determination

Calculates the official Sak rank (Eksak through Samriddhisak) accurately.

Formal Legal Document Header

Outputs official letter headers formatted to Royal Government standards.

Practical Real-World Use Cases

Public Administration & Civil Servants

Generate precise official date headers for government sub-decrees, circulars, and notifications.

Cultural & Religious Ceremonies

Determine auspicious Buddhist dates for wedding invitations, monk ordinations, and temple ceremonies.

Genealogy & Birthday Verification

Translate older relatives' traditional birth years into modern Gregorian dates for passport and ID applications.

How to Use

Select or enter a date.
View the generated Buddhist Era year (ព.ស.), animal zodiac, Sak, and formatted Khmer date string.
Copy the formatted date directly for official letterheaders and documents.

In-Depth Educational Guide

Understanding the Buddhist Era (B.E.) Calendar in Cambodia

Explore the computational logic behind the Buddhist Era calendar, the 543/544-year Gregorian offset, Cambodian lunar-solar astronomical adjustments, and traditional religious holidays.

Read Full Guide