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Islamic calendar planner

See any Hijri month laid out week by week with the Gregorian date on every day and the notable days of the month marked.

Which month

Calendar reckoning

Tabular variant
Shift the result, in days

If the calendar where you are reads a day ahead of what this gives, set +1. The shift applies to every date the tool produces.

These dates are calculated, not announced

Islamic months begin on the sighting of the new crescent, announced locally. A converted date comes from a fixed arithmetic calendar instead, so it can differ from the observed one by a day in either direction, and countries differ from each other.

Saudi Arabia’s official Umm al-Qura calendar is a third scheme again. It is published as a table rather than derived from a formula, so it is not computed here.

Choose a Hijri month and year, and the calendar appears here.

Two calendars on every square

The hard part of planning around the Islamic calendar is not converting one date. It is holding both calendars in your head at once, knowing that the 15th of the month is a Thursday, and also that it is the 22nd of next month at work. So every cell here carries the Hijri day and the Gregorian one together.

What the grid is built from

The tabular Islamic calendar: twelve months alternating between 30 and 29 days, with a day added to the last month in eleven years out of every thirty. It is fixed arithmetic, which is what makes a calendar printable a year ahead.

It is also what makes it approximate. The observed calendar begins each month when the new crescent is sighted, which is announced locally and cannot be known in advance. Where the two disagree, the announcement is right and the grid is wrong.

How far out this is safe to use

Within the current month, the dates are almost certainly the ones in use around you, the month has already begun and its start is settled. A few months out, treat the dates as accurate to within a day. A year or more out, they are good for knowing roughly where in the season something falls and not much else.

For anything with a cost attached, flights around Eid, booking time off, arranging a gathering, build in a day of slack at either end. People do this every year, and the year they do not is the year the month runs 29 days.

The days marked on the grid

Only days with a fixed position in the Hijri calendar are marked, and only those that are widely recognised. Several of them carry a note, because the date or the observance is not universal: Mawlid is kept on different days by different communities, the date of Isra and Mi’raj is traditional rather than settled, and Laylat al-Qadr is not a fixed night at all. The notes say so rather than leaving a marked square to imply more certainty than exists.

Where the week starts

The columns here run Sunday to Saturday. Many published Hijri calendars start the week on Saturday instead. It is a layout convention and nothing more, the weekday given for each date is the same either way.

Questions

Can I plan around these dates?
For anything more than a few weeks out, treat them as approximate. The grid is built from a fixed arithmetic calendar, and the real month begins when the crescent is sighted and announced locally. A day either way is normal, and two countries can be a day apart from each other. For booking time off around Eid, add a day of slack on both sides.
Why do some months have 29 days and others 30?
A lunar month is about 29 and a half days, so the calendar alternates to stay in step. Under the tabular scheme the odd-numbered months get 30 and the even-numbered ones 29, with a day added to the twelfth month in the eleven leap years of every thirty-year cycle. In the observed calendar the length is not known until the 29th evening.
Why does the week start on Sunday?
It is only a layout choice. Published Hijri calendars vary, many start the week on Saturday, and where the columns fall changes nothing about the dates. The weekday shown for each day is correct either way.
Are these all the notable days?
No. The ones marked are those with a fixed position in the Hijri calendar that are widely recognised. Local and regional observances are not included, observance of several of these varies between communities, and some dates are themselves traditional rather than settled. Each marked day carries a note where that applies.
Why is Laylat al-Qadr shown on one night?
Because the 27th is the night most widely singled out, not because it is fixed. It is sought across the odd nights of the last ten of Ramadan. Remember too that a night precedes its day, the night of the 27th begins at sunset at the end of the 26th.
Can I print this?
The page prints from your browser as it appears. If you want a month for reference rather than planning, print it and write the announced dates on top once they are known. That is the only version that will be right for where you are.

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