Julian Date Converter – Convert Gregorian Date to Julian Date

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Buddhist Era conversion

Buddhist Date Converter

Convert Gregorian dates into Buddhist Era dates, or convert Buddhist dates back into Gregorian dates using ICU calendar support.

Enter a Gregorian date to return the matching Buddhist Era date.

Live output

Result

Ready to convert

Choose a direction, enter a Gregorian or Buddhist date, and the result appears here without leaving the page.

Guide

Convert Buddhist Era dates and Gregorian dates

This Buddhist Date Converter changes Gregorian dates into Buddhist Era dates and converts Buddhist calendar input back into Gregorian dates. It is useful when a civil date is written with a Buddhist Era year and needs to be compared with a Gregorian record.

The page uses ICU's buddhist calendar. For modern dates, the month and day follow familiar civil calendar behavior while the year is represented in Buddhist Era numbering.

A separate Thai Solar Date Converter also exists because Thai official usage has its own page and explanatory context. This Buddhist converter keeps the broader ICU buddhist calendar basis visible.

What it handles

Buddhist Era conversion coverage

The converter covers bidirectional Buddhist Era date lookup using ICU calendar fields. It reads Gregorian timestamps into the buddhist calendar and validates reverse input by checking that ICU returns the same year, month, and day.

This approach keeps the page deterministic. It does not attempt to model every regional Buddhist calendar tradition, festival calendar, or historical local rule.

Gregorian to Buddhist

Enter a Gregorian date and return the corresponding Buddhist Era year, month, day, month label, and weekday.

Buddhist to Gregorian

Enter a Buddhist date in YYYY-MM-DD format and convert it back into a Gregorian date.

ICU validation

Invalid Buddhist calendar values are rejected through round-trip validation rather than silently normalized.

How to use

Use the Buddhist conversion modes

Choose Gregorian to Buddhist when your source is a standard Gregorian date. Choose Buddhist to Gregorian when your source is already written with a Buddhist Era year.

Buddhist input must use YYYY-MM-DD. Keep the year in Buddhist Era numbering, not Gregorian numbering, and keep month and day as two-digit numeric values.

1

Choose Gregorian to Buddhist

Use this direction for a Gregorian date such as 2026-06-30. The result is Buddhist Era 2569-06-30.

2

Choose Buddhist to Gregorian

Use this direction for Buddhist input such as 2569-06-30. The converter returns the matching Gregorian date.

3

Check the page scope

Use this page for ICU Buddhist Era date conversion. Use the Thai Solar page when you specifically need the modern Thai official calendar wording.

Examples

Reference conversions from the local implementation

These examples are generated from the same ICU-backed conversion functions used by the form. They show the common modern relationship between Gregorian years and Buddhist Era years.

Gregorian date to Buddhist date

2026-06-30 -> 2569-06-30

The Gregorian date 2026-06-30 converts to Buddhist Era 2569-06-30.

Buddhist date to Gregorian date

2569-06-30 -> 2026-06-30

The Buddhist input 2569-06-30 converts back to Gregorian 2026-06-30.

FAQ

Buddhist date conversion notes

Buddhist Era dates often appear in civil records, but the term can also point to local traditions. These answers explain what this converter does and how it differs from nearby pages.

Is this only for Thai dates?

No. This page exposes ICU buddhist calendar conversion. Thai official civil usage is covered separately by the Thai Solar Date Converter.

What format should Buddhist input use?

Use YYYY-MM-DD with the Buddhist Era year, for example 2569-06-30. The converter validates the date through ICU before returning a result.

Does this calculate religious observances?

No. It converts civil calendar dates and does not calculate festival dates, lunar observances, or local religious calendar rules.

Reference

Calendar implementation reference

The converter uses PHP Intl calendar objects backed by ICU. ICU documents the buddhist calendar identifier and the calendar services used for deterministic conversion.