The Hijri Calendar Explained (and Why to Use It Daily)
6/5/2026 · Updated 9/17/2026 · 7 min
In short — The Hijri calendar is the Islamic lunar calendar, counted from the Prophet's migration to Medina in 622 CE. Its twelve months run 29 or 30 days, so the year is about 354 days and Islamic dates fall roughly eleven days earlier each Gregorian year. Seeing the Hijri date daily is what stops Ramadan, the ten days of Dhul Hijjah and the sacred months arriving by surprise.
Most Muslims know the Hijri calendar from Ramadan and Eid, and live the rest of the year by the Gregorian one.
But the Islamic calendar was never only for marking festivals. It is a quiet way of keeping faith woven into ordinary time — and, practically, it is what stops the best weeks of the year slipping past unnoticed. Here is how it works, which months carry weight, and why seeing it daily changes something.
What the Hijri calendar is
The Hijri calendar is the Islamic lunar calendar, counting years from the Hijrah — the Prophet's ﷺ migration from Mecca to Medina in 622 CE.
That event, and not his birth, marks year one. The Hijrah was the turning point at which the Muslim community properly began, and dating from it says something about what the calendar is for. Dates are written with AH — Anno Hegirae, "in the year of the Hijrah".
How the months work
There are twelve lunar months, each beginning with the sighting of the new crescent:
| # | Month | # | Month | |
|---|---|---|---|---|
| 1 | Muharram | 7 | Rajab | |
| 2 | Safar | 8 | Sha'ban | |
| 3 | Rabi' al-Awwal | 9 | Ramadan | |
| 4 | Rabi' al-Thani | 10 | Shawwal | |
| 5 | Jumada al-Awwal | 11 | Dhu al-Qa'dah | |
| 6 | Jumada al-Thani | 12 | Dhu al-Hijjah |
Each month is 29 or 30 days depending on the moon, which makes the year about 354 days — roughly eleven days shorter than the Gregorian year.
Why it shifts each year
Because the lunar year is shorter, Islamic dates move about eleven days earlier in the Gregorian calendar every year. That is why Ramadan travels slowly through the seasons across a lifetime: long summer fasts, then short winter ones, and back again.
This is not a flaw to be corrected. It means every season is eventually touched by Ramadan, and no part of the world is permanently advantaged or permanently burdened.
It is also why a converter is genuinely useful rather than a novelty — the offsets do not repeat in a way you can hold in your head. If you need one, ours is here and free.
The seasons of worship it carries
Knowing where you are in the Hijri year is the difference between arriving at these prepared and noticing them afterwards.
Ramadan (month 9)
The month of fasting, and the one everybody already tracks. What most people don't track is its approach — which is the actual problem, because a Ramadan planned during Sha'ban goes very differently from one that starts on the first night. Planning it in advance is most of the work.
The first ten days of Dhu al-Hijjah (month 12)
Most Muslims pour everything into the last ten nights of Ramadan and then let the first ten days of Dhul Hijjah pass like an ordinary week. Yet the Prophet ﷺ said:
"There are no days in which righteous deeds are more beloved to Allah than these ten days." The companions asked, "Not even jihad in the path of Allah?" He replied, "Not even jihad — except a man who goes out risking his life and wealth and returns with nothing."
— Sahih al-Bukhari 969, narrated by Ibn Abbas
By that hadith these are the best days of the year for good deeds. Allah swears by them in the Quran — "By the dawn, and by the ten nights" (89:1–2), understood by many scholars to be these. They gather forms of worship found in no other season: fasting, prayer, Hajj, charity and the sacrifice all converge, building to the Day of Arafah (the 9th) and Eid al-Adha (the 10th).
The difference between a transformative Dhul Hijjah and a forgotten one is almost always a plan made before the month starts. You don't need to do everything — you need to choose a few things and schedule them:
- Fasting the first nine days, or as many as you can. The Day of Arafah is the one to protect: for non-pilgrims its fast is reported to expiate the year before and the year after.
- Takbir and dhikr — increase Allahu akbar, la ilaha illa Allah, alhamdulillah aloud and often, from the first of the month.
- Quran — a raised daily portion, decided in advance, for these ten days only.
- Charity — small and daily rather than one lump, so it touches every one of the ten.
- Qurbani / Udhiyah — arrange the sacrifice before the rush, not during it.
- The five prayers on time, plus voluntary prayers. The simplest deed and the first one a busy week eats.
Muharram (month 1)
One of the four sacred months, and it carries the fast of Ashura on the tenth — reported to expiate the previous year. It falls just as the Hijri year turns, which makes it a natural point to set intentions for the year the way other people do in January.
Rajab and Sha'ban (months 7 and 8)
Not seasons of worship in themselves so much as the run-up to Ramadan. Their real function is warning: if you are watching the Hijri date, Rajab is the month in which Ramadan stops being abstract and becomes something you can still prepare for.
Why live by it day to day
When you check the Hijri date once a year, Ramadan arrives suddenly.
When you see it every day, you live inside the rhythm of the Islamic year instead of visiting it twice. You notice the white days approaching — the 13th, 14th and 15th of each month, the recommended days for voluntary fasting. You feel Ramadan coming through Rajab and Sha'ban rather than being ambushed by it. You reach the first of Dhul Hijjah having already decided what you will do with the ten days.
The calendar becomes a constant, gentle reminder that your time belongs to a sacred order and not only to deadlines and weekends.
Keep both side by side
You do not abandon the Gregorian calendar. Your work and the world run on it, and pretending otherwise is a pose rather than a practice.
The aim is to see both at once: the Gregorian date for the dunya, the Hijri date keeping the deen present. Two lines instead of one, in the same place you already look. It is a small habit with a disproportionate effect on how connected ordinary life feels to your faith.
Common questions
Why do Hijri dates sometimes differ by a day between countries? Because the month begins with the sighting of the crescent, and sighting is local. Some countries follow local sighting, some follow Saudi Arabia, and some use a calculated calendar such as Umm al-Qura. A one-day difference is normal and not an error — follow your local authority or masjid.
Is the Hijri calendar the same as the Umm al-Qura calendar? Not quite. Umm al-Qura is a calculated implementation of the Hijri calendar, used officially in Saudi Arabia and by most converters. It is precise and predictable, which is why software uses it — but a locally sighted month may still begin a day either side of it.
Why is the year 1448 and not something closer to 2026? Because the count started in 622 CE and the lunar year is about eleven days shorter. Those eleven days compound: after fourteen centuries the two calendars have drifted more than forty years apart.
What are the four sacred months? Dhu al-Qa'dah, Dhu al-Hijjah, Muharram and Rajab. Fighting was traditionally forbidden in them, and wrongdoing in them is considered graver — three of the four fall consecutively around the season of Hajj.
Do I have to fast the white days? They are recommended, not obligatory — the 13th, 14th and 15th of each lunar month. Their practical appeal is that they are the same three dates every month, so they are easy to keep once you can see the Hijri date without looking it up.
Munazzim shows the Hijri date beside the Gregorian one on every day of your planner, so the Islamic year stays in view while you plan an ordinary week. Free to start, no card.