Why does a single Gregorian month sometimes show two different Hijri months in the grid?

Because Hijri months don't align with Gregorian month boundaries — a given Gregorian month will often begin in one Hijri month and end in the next.

Can I look up a future year, like 5 years from now?

Yes — enter any Gregorian year and month; the tabular Hijri calculation works for any date, past or future.

Why do the Hijri dates shown here sometimes differ by a day from my country's official calendar?

This tool uses a fixed tabular (arithmetic) calculation, while many countries announce Hijri dates based on local moon sighting, which can differ by a day.

How many Hijri months can appear across a full Gregorian year?

All 12, since each Hijri month is about 29-30 days and the whole cycle drifts against the Gregorian calendar.

Is this the calendar used to determine when Ramadan starts?

The calculation method (Umm al-Qura tabular) is the same one used by this site's Ramadan Date tool, though your local moonsighting authority's own announcement determines the religiously observed start.

Does this account for the extra day added in Hijri leap years?

Yes — the underlying tabular calendar's 30-year leap cycle (which adds a day to Dhu al-Hijjah in certain years) is handled automatically.

Can I see a whole Hijri year's worth of Gregorian dates instead of one Gregorian month at a time?

Not directly — this tool is organized by Gregorian month; to find where a specific Hijri month starts and ends, check month-by-month or use the Hijri Date Converter for individual date lookups.

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Islamic Tools

Islamic Calendar Calculator

See the Hijri date for every day of any Gregorian month.

🔒 Runs entirely in your browser — nothing here is ever uploaded

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Last reviewed 2026-09-06

About the Islamic Calendar Calculator

Shows the Hijri (Islamic) calendar date for every day of any chosen Gregorian month.

100% Free Runs in Your Browser No Sign-Up Required

How to use it

Choose a Gregorian month.
Choose a Gregorian year.
Read each day's corresponding Hijri date in the table.
Scroll down the table to see which Hijri month(s) the selected Gregorian month spans — many months span two.

Formula

Each Gregorian day in the selected month is individually converted using the Umm al-Qura tabular Hijri calendar.

Worked example

September 2026 spans two Hijri months: it begins in Safar 1448 and moves into Rabi' al-Awwal 1448 partway through.

The 12 Hijri months

The 12 Hijri months
#	Hijri month	Notable for
1	Muharram	Islamic New Year (1st); one of the four sacred months; Day of Ashura (10th)
2	Safar	No major fixed observance
3	Rabi' al-Awwal	Traditionally associated by many Muslims with Mawlid al-Nabi (the Prophet's birth)
4	Rabi' al-Thani	No major fixed observance
5	Jumada al-Awwal	No major fixed observance
6	Jumada al-Thani	No major fixed observance
7	Rajab	One of the four sacred months; traditionally linked to Isra and Mi'raj
8	Sha'ban	Month immediately preceding Ramadan
9	Ramadan	Month of obligatory fasting (sawm), one of the Five Pillars of Islam
10	Shawwal	Begins with Eid al-Fitr (1st)
11	Dhu al-Qi'dah	One of the four sacred months
12	Dhu al-Hijjah	Month of the Hajj pilgrimage; one of the four sacred months; Eid al-Adha (10th)

Interpreting your result

Same tabular-calculation caveat as the Hijri Date Converter: this may differ by a day from your local moonsighting-based calendar.

Recommendations

• Useful for seeing which Gregorian dates a given Hijri month (like Ramadan) will span, at a glance.

Frequently asked questions

No — since a Hijri year is about 354 days (shorter than a Gregorian year), the Gregorian date of any Hijri month drifts earlier by about 11 days each year.