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📅 Universal Calendar Conversion · Local Scripts & Reading Guides
Multi-Calendar Date Converter
Convert Gregorian (English) dates to Bangla (Bangladesh Official), Hijri (Arabic), Persian (Jalali), Hebrew, Chinese Lunar, Indian National Saka, Thai Solar, and Japanese Imperial calendars.
Step-by-Step Guide
- 1Select or enter any English (Gregorian) date using the date input.
- 2Use the quick buttons (Today, Tomorrow, etc.) to skip across times.
- 3Observe the converted dates in the side-by-side card layouts.
- 4Read the native script and pronunciation helpers under each calendar.
Conversion System
Bangla: 2019 Academy Reform
Hijri: Standard Civil Tabular
Persian / Jalali: Solar Hijri
Others: Intl.DateTimeFormat API
All conversions are computed locally in your web browser. No inputs or dates are sent to external servers, protecting your privacy.
Calendar Reference
Calendar rules are based on their respective civil and astronomical definitions. The Bangla calendar conforms to the official standard in Bangladesh. Hijri dates are based on standard mathematical tabular civil rules. Other calendars follow standard Unicode CLDR definitions.
Understanding the Different Calendar Systems
Human civilizations have developed different ways to track time. Solar calendars (like the Gregorian, Persian, Thai, and Indian Saka calendars) follow the Earth's orbit around the Sun. Lunar calendars (like the Hijri calendar) align strictly with the moon phases, causing months to cycle through seasons. Lunisolar calendars (like the Chinese and Hebrew calendars) combine both cycles, adding extra leap months (intercalary months) periodically to keep aligned with solar seasons.
Last updated: June 2026. Calendar conversions are accurate based on current consensus astronomical algorithms.
References & Standards
- Bangla Academy (Bangladesh) — Official 2019 reform guidelines for the Bengali calendar.
- Islamic Tabular Calendar (Civil Standard) — Mathematical standards used for civil date tracking.
- Unicode Common Locale Data Repository (CLDR) — Standardized calendar mappings used by modern operating systems and web browsers.
Useful Conversion Tips
- 1Select a date in the Gregorian calendar to instantly view its equivalents across all calendars.
- 2Use the quick action buttons (Today, Yesterday, Tomorrow) to jump between key dates quickly.
- 3Check the native script format of the converted date to see how it is written locally.
- 4For Hijri (Islamic) dates, note that they might vary by 1-2 days depending on moon visibility.
- 5Use the step buttons (+/- Day, Month, Year) to easily observe calendar transitions and leap years.
Frequently Asked Questions
How does the Bangla calendar conversion work in this tool?
The tool converts Gregorian dates to the official Bangla calendar of Bangladesh, which was reformed by the Bangla Academy in 2019. In this system, the first six months (Boishakh to Ashwin) are exactly 31 days, and the last six months are 30 days, except Falgun which has 29 days (or 30 days in a leap year). Poyela Boishakh (New Year) is fixed to April 14 in the Gregorian calendar.
Are the Hijri (Islamic) dates 100% accurate?
The Hijri calendar is calculated using the standard mathematical tabular civil calendar. Because actual Islamic months depend on the sighting of the new crescent moon, the calculated date may differ by 1 to 2 days from local sightings in some countries like Bangladesh or India. It is recommended to verify with local Islamic authorities for official religious observations.
What is the Persian (Jalali) calendar?
The Persian calendar, also known as the Jalali or Solar Hijri calendar, is the official calendar of Iran and Afghanistan. It is a solar calendar that begins on the vernal equinox (Nowruz, usually March 20 or 21). It is one of the most accurate calendars in existence, using a complex cycle of leap years.
What is the Chinese Lunar calendar cycle year?
The Chinese Lunar calendar is a lunisolar calendar. The cycle year is represented by the Heavenly Stems and Earthly Branches (Ganzhi), which repeat in a 60-year cycle. For example, 2026 is the year of the Fire Horse ('bing-wu').
What is the Indian National Saka calendar?
The Indian National Calendar (Saka calendar) is the official civil calendar of India, adopted in 1957. It begins on the vernal equinox (March 22, or March 21 in leap years) and is dated from the Saka Era (78 CE). The first month is Chaitra.
How are the other calendars formatted?
The tool leverages standard web standards (JavaScript's Intl.DateTimeFormat API) to perform high-precision, client-side conversions for Hebrew, Chinese, Indian Saka, Thai Solar (Buddhist), and Japanese Imperial calendars. This ensures the conversion is extremely fast, private, and works offline.