Gregorian To Hijri Converter Online — Free Gregorian To Hijri Converter Tool
CodexFuse Team · 2026-10-30T12:15:31.509Z · 10 min read min read
Convert any Gregorian date to its Hijri equivalent with the free CodexFuse tool — plus a worked Ramadan campaign example and honest limits.
A Gregorian to Hijri converter turns a date from the solar Gregorian calendar into its equivalent date in the lunar Hijri calendar. You enter a day, month and year as you know them, and it returns the Hijri day, month name and year in AH, for example 11 March 2024 becomes 1 Ramadan 1445 AH. It removes the mental arithmetic of a calendar that is about 11 days shorter every year, so planning around Ramadan, Eid or a Hijri anniversary stops being guesswork.
The confusion usually starts with a simple question: is Ramadan starting on the date your spreadsheet says, or a day later? A free Gregorian to Hijri converter answers that for civil planning in seconds, without you working through lunar months by hand.
What does a Gregorian to Hijri converter actually convert?
A Gregorian to Hijri converter maps one calendar system onto another: it takes a solar date of 365 or 366 days and finds the matching lunar date in a year of 354 or 355 days. The Hijri calendar has 12 lunar months of 29 or 30 days, starting from the Prophet's migration in 622 CE, which is why Hijri years carry the AH suffix. Because the lunar year is shorter, every Hijri date drifts about 11 days earlier in the Gregorian calendar each year, and a date that fell in spring one decade can fall in winter a decade later.
That drift is exactly why conversion is not a one-off lookup. A birthday, a contract renewal or a marketing campaign tied to a Hijri date needs converting afresh each year, and the converter does that arithmetic for you.
Why the Hijri date on your phone sometimes disagrees by a day
Different converters can disagree by a day, and neither is necessarily broken. The CodexFuse tool uses the Kuwaiti tabular calendar, a fixed arithmetic calendar that assigns 29 or 30 days to each month by formula. Saudi Arabia's official Umm al-Qura calendar and local moon-sighting announcements can place the same month a day apart, because they follow observation or a different calculation.
For civil planning, a one-day difference is a rounding issue you can note and move on. For fasting or Eid, always confirm with your local authority instead of trusting any converter alone.
The tabular result is a planning figure, not a religious ruling. If a date decides when you fast or celebrate Eid, check your local mosque or authority's announcement before acting on it.
How to use the CodexFuse converter, step by step
The tool asks for just three numbers, and nothing else. That simplicity is the point: there is no account form, no spreadsheet and no formula to remember.
- Enter the year first: type a Gregorian year between 1900 and 2100 into the year field.
- Add the month and day: enter the month as a number from 1 to 12 and the day from 1 to 31.
- Press Calculate: the tool returns the Hijri day, month name and year, such as 5 Jumada al-Ula 1448 AH for 17 October 2026.
- Copy the result: use the copy button to paste the Hijri date straight into a document, email or calendar note.
- Try a preset: the Ramadan and New Year presets jump straight to well-known dates, including Ramadan 1445, if you want a quick reference point.
If you enter a year outside 1900 to 2100, the tool asks for a valid year rather than silently returning a wrong date. That guard matters: a typo like 210 instead of 2010 would otherwise produce a confidently wrong Hijri date.
A worked example: planning a Ramadan campaign without a date mix-up
Meet Amira, a fictional operations manager at a small online grocery store in Manchester. Her team runs a Ramadan food-box promotion every year, and last year they announced the launch a day late because two team members used different Hijri calendars. This year she checks every date before it goes public.
Amira starts with the anchor date her supplier gave her: 11 March 2024, which the converter confirms as 1 Ramadan 1445 AH. She then checks the coming Ramadan the same way and finds that 1 Ramadan 1447 AH falls on 18 February 2026 by the tabular calendar. She notes the one-day caveat in her plan, so the launch email is worded around the week rather than a single disputed day.
Next she converts a delivery blackout date her warehouse proposed, 17 October 2026, and gets 5 Jumada al-Ula 1448 AH — useful because a supplier's invoice references the Hijri date and her team needs both versions on file. Each conversion takes under a minute: year, month, day, Calculate, copy. The result is a campaign calendar where every Gregorian date has a matching Hijri date, no one argues about which calendar a colleague used, and the launch goes out on time.
| Gregorian date entered | Hijri result (tabular calendar) | What Amira used it for |
|---|---|---|
| 11 March 2024 | 1 Ramadan 1445 AH | Confirmed last year's Ramadan start as a reference point |
| 18 February 2026 | 1 Ramadan 1447 AH | Anchored this year's campaign launch window |
| 17 October 2026 | 5 Jumada al-Ula 1448 AH | Matched a supplier invoice that quoted the Hijri date |
The lesson is not the three dates themselves. It is the habit: convert, copy, file both versions, and flag the one-day tolerance wherever a date is public-facing.
When a Hijri date will appear in public — a poster, an email subject line or a booking page — write both dates together, for example "18 February 2026 (1 Ramadan 1447 AH, tabular calendar)". Readers can then spot a one-day local difference without thinking you made an error.
The 12 Hijri months, and why Ramadan moves every year
The Hijri year runs through Muharram, Safar, Rabi' al-Awwal, Rabi' al-Thani, Jumada al-Ula, Jumada al-Akhirah, Rajab, Sha'ban, Ramadan, Shawwal, Dhu al-Qa'dah and Dhu al-Hijjah. Ramadan is the 9th month, the month of fasting, and Shawwal is the 10th, when Eid al-Fitr falls.
Because 12 lunar months add up to roughly 354 days, the Hijri year is about 11 days shorter than the Gregorian year. That is why Ramadan starts about 11 days earlier each Gregorian year. A Gregorian to Hijri converter simply tracks that drift for you.
What this converter does not do
Honest limits matter more than features here, because a wrong date can mean a missed fast or a botched launch. This tool converts in one direction only, Gregorian to Hijri, so it cannot turn a Hijri date back into a Gregorian one.
- One direction only: for the reverse conversion, use the separate Hijri to Gregorian converter instead of trying to work backwards.
- Tabular, not observed: results follow the Kuwaiti tabular calendar and can differ by a day from moon-sighting announcements.
- Year range is fixed: only Gregorian years from 1900 to 2100 are accepted, so very old historical dates are out of scope.
- Not a religious authority: it gives a calculated date, not a ruling on when to fast or celebrate.
Within those limits it is exactly the right tool: fast, free and consistent for planning, record-keeping and cross-checking documents that quote both calendars.
If your business runs campaigns, bookings or deliveries around Hijri dates, CodexFuse takes the surrounding tech off your plate — fully managed hosting, business email and backups on pay-as-you-go credits, so a date mix-up is the only thing you ever have to check yourself.
Get Started with CodexFuseWhen a date mix-up is really a business-systems problem
Amira's story has a second half that has nothing to do with calendars. Her launch email went out late last year partly because the date was disputed — and partly because her team's website and email were spread across three unmanaged services, so nobody owned the fix. That pattern is common: the calendar gets the blame, while the real cost is a business running on tools nobody manages.
CodexFuse fits here as a concrete workflow, not a slogan. A small business moves its website hosting and business email onto one managed platform, points its domain across, and lets the platform handle updates, security and backups. Campaign pages stay up during launch week, and a bad edit the night before launch is reversible from backup.
If email deliverability is part of your campaign plan, it is worth checking that your domain's sender records are set up correctly before you send anything time-sensitive; our guide to setting up business email walks through the basics, and validating your SPF record catches one of the most common reasons campaign mail lands in spam. And because a launch-week mistake is only cheap if you can undo it, the 3-2-1 backup rule is the simplest safety net to have in place before you publish anything dated.
If you are preparing seasonal greetings alongside your campaign, our guide to the free greeting card maker shows how to create them without design software.
Frequently Asked Questions
How do I convert a Gregorian date to Hijri?
Enter the Gregorian year (1900-2100), month (1-12) and day, then press Calculate. The tool returns the Hijri day, month name and year — for example, 11 March 2024 converts to 1 Ramadan 1445 AH. Copy the result straight into your document or calendar note.
Why is the Hijri date sometimes a day different from another converter?
This converter uses the Kuwaiti tabular calendar, a fixed arithmetic system, while Umm al-Qura and moon-sighting announcements can differ by a day. For civil planning the difference rarely matters, but for fasting and Eid always confirm with your local authority.
When does Ramadan start?
By this converter's tabular calendar, 1 Ramadan 1445 AH was 11 March 2024, 1 Ramadan 1446 AH was 1 March 2025, and 1 Ramadan 1447 AH is 18 February 2026. Ramadan moves about 11 days earlier each Gregorian year because the Hijri year is shorter.
Can I convert a Hijri date back to Gregorian with this tool?
No, this tool converts Gregorian to Hijri only. For the reverse direction, use the separate Hijri to Gregorian converter, which takes a Hijri day, month and year and returns the Gregorian date.
What years can I convert?
Gregorian years from 1900 to 2100. Enter a year outside that range and the tool asks you to enter a valid year, and the month must be 1 to 12 with the day 1 to 31.
How long is a Hijri year?
A Hijri year is 354 days in a common year and 355 in a leap year, with 12 lunar months of 29 or 30 days. That is about 11 days shorter than the Gregorian year, so Hijri dates drift earlier each year.
Start with the right date — and stop babysitting the tech around it
Convert your dates with the free Gregorian to Hijri converter today, file both calendar versions for every public date, and flag the one-day tolerance where it matters. Then fix the part that actually costs you launches: move your hosting, business email and backups to CodexFuse, where they are fully managed on pay-as-you-go credits with no subscriptions and no server babysitting. Do it before your next dated campaign goes out, not after it goes wrong.