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Is it a leap year in the Baha'i calendar?

Baha'i Leap Year Checker computed to the accepted standards of the Baha'i calendar (a year spans 365366 days), with a clear result format and easy copying.

Inputs

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How to calculate

Baha'i Leap Year Checker for the bahai calendar

Enter the date values and the tool computes the result for the bahai calendar system.

  1. 1

    Step 1

    Enter the year to check under Baha'i calendar rules.

  2. 2

    Step 2

    We apply the Baha'i epoch and leap rules — year 1 = 1844 CE (Naw-Rúz ≈ 21 March).

  3. 3

    Step 3

    Read the result exact to the day — Baha'i leap years (365–366 days) applied automatically.

Use Cases

Leap check under Baha'i rules

Test any year against the Baha'i intercalation rule instead of the divisible-by-four shortcut, which answers the Gregorian question only; a year can be leap in one system and common in the other.

Cross-check Baha'i against Gregorian

Compare a Baha'i date with its Gregorian counterpart only after converting it, never by comparing raw day or year numbers, because the two systems start from different epochs and count leap years on different cycles.

Tips

  • 1

    This Baha'i Leap Year Checker follows Baha'i calendar rules — its own epoch, month lengths, and leap years — so the result can differ from a Gregorian-based calculation of the same date; treat the calendar system as part of the input.

  • 2

    Enter the Baha'i dates in YYYY-MM-DD format to avoid ambiguity — some conventions read 03/04 as March fourth and others as April third, and a swapped month and day silently shifts every result this page derives.

  • 3

    For deadlines tied to authorities or contracts, confirm which calendar the deadline officially uses before converting it here — a Baha'i date read in the wrong system can be off by days or even a full year.

Common Mistakes

  • The “divisible by 4” shortcut answers the Gregorian question, not the Baha'i one: century years and system-specific intercalary rules both break it. Run the baha'i leap rule on the actual year instead of pre-filtering it yourself.

  • Copied results lose their calendar context: a Baha'i date pasted into a document or app that assumes Gregorian silently misstates anniversaries and deadlines by years. Label the system whenever the result leaves this page.

FAQs

Is baha'i leap year checker free to use?

Yes — 100% free and instant in your browser.

Why does baha'i leap year checker differ from an app?

Some apps apply local sighting or regional adjustments (±1 day); this tool uses the Baha'i arithmetic standard — year 1 = 1844 CE (Naw-Rúz ≈ 21 March).

How accurate is the result of baha'i leap year checker?

It applies the Baha'i calendar's arithmetic exactly — 19 months × 19 days (361 days) plus 4–5 intercalary days; year 1 = 1844 CE (Naw-Rúz ≈ 21 March).

Which calendar systems does baha'i leap year checker support?

The site covers 14 systems — Gregorian, Hijri, Coptic, Hebrew, Persian, Julian and more — each with its own epoch and leap rules.