Islamic Date Converter

The Islamic (Hijri) calendar is lunar: twelve months totaling about 354–355 days per year, counted from the Hijra epoch. Religious observances—Ramadan, Eid al-Fitr, Eid al-Adha, and Muharram—follow Hijri dates that shift through Gregorian seasons over a 33-year cycle. This converter maps Gregorian civil dates to Hijri (year, month, day) and back using tabular or Umm al-Qura rules as labeled on the form.

Lunar months and observance

Month lengths alternate 29/30 in theory; official tables set month ends for Saudi Umm al-Qura or global tabular schemes. Communities that require crescent sighting may announce different starts—software output is predictive, not a fatwa.

Hebrew lunisolar dates: Hebrew date. Civil planning: date tools.

Hijri year numbering

AH years count from the Hijra. A Gregorian 2026 spans parts of AH 1447–1448 depending on month—always display both calendars in UX copy for clarity.

Leap day rules differ from Gregorian; do not assume February 29 logic applies.

Regional calendar authorities

Saudi Arabia publishes Umm al-Qura tables; Turkey uses Diyanet arithmetic; Malaysia may follow local sighting committees. Mismatch between apps often means different authority tables, not user error.

Pair festival planning with US federal holidays {CY} only for civic leave—not religious dates.

Worked Islamic examples

Example: find Hijri date for a 2026 payroll accrual tied to Ramadan start— convert expected Gregorian range and label table source in HR docs.

Example: archive digitization—manuscript dated 12 Ramadan 1400 AH converts to Gregorian for catalog sort keys.

Example: compare days until civil countdown with Hijri month length when explaining why Eid moves earlier each Gregorian year.

Accuracy statement

Outputs follow the algorithm selected on-page. For mosque announcements, defer to local religious authority when sighting overrides tables.

Epoch integers: Unix timestamp. Mayan: Mayan calendar.

Ramadan and payroll planning

HR teams planning flexible hours during Ramadan need predicted Hijri starts with footnotes about sighting variance. Publish Gregorian ranges alongside Hijri labels in employee portals.

Zakat and charity campaigns reference Hijri anniversaries—convert for global teams working in civil fiscal calendars.

Software localization

Mobile apps should show Hijri only when users enable Islamic calendars, with clear table authority in settings. Avoid hardcoding one national table for worldwide users.

Pair with Hebrew date converter in comparative religion curricula, not for scheduling the same event twice.

Notification timing

Push notifications about Ramadan should fire using the user's chosen table authority and include Gregorian dates in parentheses to reduce support tickets.

Financial systems accrue on civil dates while charities report Hijri campaigns—keep both fields in CRM without overwriting either.

Charity reporting

Annual reports listing Hijri campaign dates should footnote table authority and Gregorian equivalents for auditors unfamiliar with lunar calendars.

Do not infer Hijri from Gregorian alone for Zakat deadlines—use official announcements.

Global HR policy documents

Multinational employee handbooks should list Ramadan start as a Gregorian range with Hijri reference footnoted to Umm al-Qura or local authority. Avoid single-date absolutes that trigger pay disputes when sighting committees announce differently.

Academic semester planning

Universities scheduling exams during Ramadan need Hijri ranges in academic calendars with Gregorian footnotes for registrar systems. Avoid scheduling mandatory daytime events on Eid dates predicted by the wrong national table.

Banking and moon-sighting markets

Islamic finance products tied to Hijri month-end need explicit table authority in prospectuses—regulators ask which calendar software produced payment dates. Never silently swap national tables mid-contract without customer notice.

Widget transparency

Home-screen Hijri widgets should link to settings explaining table source—users trust dates more when authority is one tap away.

Customer support macros

Support templates explaining Ramadan dates should link here rather than static screenshots that stale within a year— reduces ticket reopen rates.

Press release review

Communications teams announcing Eid holidays should paste predicted Hijri here alongside civil dates before sending wires— avoids transposed months.

Airport lounge signage

Lounges in Gulf hubs sometimes show Hijri clocks—travelers verify against this converter when connecting flights depend on civil check-in times.

Embassy holiday lists

Embassy websites listing Hijri observance should update Gregorian ranges annually—static PDFs stale quickly; link live conversion for press officers drafting advisories.

Stock photography captions

Media teams captioning Ramadan imagery should verify Hijri month names against converted shoot dates— mislabeled months generate avoidable social media corrections.

University housing

Residence life staff planning hall dinners during Eid should confirm Hijri dates with student cultural groups before booking caterers on civil calendar alone.

Widget refresh policy

Refresh Hijri widgets after national moon announcements even when tabular software disagrees— user trust follows official proclamations in many countries. Log refresh dates in admin changelogs for support staff. Pin a canonical FAQ link beside every Hijri display in customer portals and mobile home screens. Train support macros to cite the active table name in every reply about holiday dates, payroll cutoffs, campus dining hours, travel advisories, exam schedules, and library closures.

Community bulletin boards

Mosques posting printed Hijri calendars should stamp table authority and Gregorian range in footer text— visitors photograph boards and share online without context otherwise.

Moon sighting and regions

Hijri dates for Ramadan and Eid may follow local moon sighting rather than calculated tabulations—this converter shows standard arithmetic results, not national announcement policies. Travelers should confirm country-specific proclamation dates before booking 2026 leave.

Financial systems using Umm al-Qura tables should match backend constants to this page’s assumptions when auditing conversion batches for the fiscal year.

Payroll and leave systems

HR portals may store Gregorian hire dates while employees request leave in Hijri—reconcile both columns in 2026 audits. Public-sector holiday calendars vary by country; do not import one nation's table into another region's policy without legal review.

Academic calendars abroad

Universities in Gulf states may publish Hijri terms alongside Gregorian 2026 semesters—store both in student handbooks to avoid booking flights on observed Eid rather than calculated tabulation alone. Library due dates crossing Ramadan should follow campus closure policy, not this converter in isolation.

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