How to Read a Hijri Calendar: A Complete Beginner's Guide

The Hijri calendar (also called the Islamic calendar or lunar calendar) is the calendar system used by Muslims worldwide to determine the dates of Islamic religious observances, fasting days, and important events. If you're new to the Islamic calendar, reading a Hijri calendar may seem confusing at first — especially because it runs differently from the Gregorian calendar you use every day. This guide will walk you through everything you need to know.

Understanding the Basics: What Makes a Hijri Calendar Different?

Before reading a Hijri calendar, it helps to understand the fundamental difference between the Hijri and Gregorian calendars:

• Gregorian Calendar: A solar calendar based on Earth's orbit around the sun. Has 365 days per year (366 in leap years). The year always starts on January 1.
• Hijri Calendar: A lunar calendar based on the moon's orbit around Earth. Has 354 or 355 days per year. The year starts on 1 Muharram, which falls on a different Gregorian date each year.

The most important implication of this difference: the Hijri calendar moves approximately 11 days earlier relative to the Gregorian calendar each year. This is why Ramadan, Eid, and other Islamic observances fall on different Gregorian dates annually.

The Structure of the Hijri Calendar

The 12 Hijri Months

The Hijri year consists of exactly 12 months, in this order:

1. Muharram (محرم) — 30 days
2. Safar (صفر) — 29 days
3. Rabi al-Awwal (ربيع الأول) — 30 days
4. Rabi al-Thani (ربيع الثاني) — 29 days
5. Jumada al-Awwal (جمادى الأول) — 30 days
6. Jumada al-Thani (جمادى الثاني) — 29 days
7. Rajab (رجب) — 30 days
8. Sha'ban (شعبان) — 29 days
9. Ramadan (رمضان) — 30 days
10. Shawwal (شوال) — 29 days
11. Dhul Qa'dah (ذو القعدة) — 30 days
12. Dhul Hijjah (ذو الحجة) — 29 or 30 days

Note: These month lengths are approximate and can vary by one day depending on moon sighting. Odd-numbered months generally have 30 days; even-numbered months have 29 days.

Year Length

A standard Hijri year has 354 days. Leap years have 355 days (an extra day added to Dhul Hijjah). The Hijri calendar has a 30-year cycle with 11 leap years.

How to Read Dual-Date (Hijri-Gregorian) Calendars

Most Islamic calendars used outside Muslim-majority countries display both Hijri and Gregorian dates. Here is how to read them:

The Large Number = Gregorian Date

On dual-date calendars, the larger, more prominent number in each calendar cell is usually the Gregorian date — the date in your standard (civil) calendar.

The Small Number = Hijri Date

A smaller number (often in a different color or font) indicates the corresponding Hijri date for that day. This tells you what Islamic day it is on that particular Gregorian date.

The Month Header

At the top of each month section, you will typically see:

• The Gregorian month name (e.g., "March 2026")
• The corresponding Hijri month(s) — often two months are shown because Hijri months don't align perfectly with Gregorian months

For example, a calendar might show "March 2026 — Sha'ban / Ramadan 1447 H" because March contains parts of two different Hijri months.

Understanding the "H" in Hijri Dates

When you see a year followed by "H" or "AH," this refers to the Hijri year — Anno Hegirae (Latin for "in the year of the Hijra"). For example:

• 1447 H = Hijri year 1447
• 1448 AH = Islamic year 1448

The Hijri calendar began in 622 CE — the year of the Prophet Muhammad's migration (Hijra) from Mecca to Medina. This is year 1 AH.

Reading a Monthly Hijri Calendar

Here is a step-by-step guide to reading a standard monthly Hijri calendar page:

Step 1: Identify the Month and Year

Look at the header. It will show the Hijri month name (e.g., "Ramadan") and the Hijri year (e.g., "1447"). Many calendars also show the corresponding Gregorian months.

Step 2: Identify the Days of the Week

Hijri calendars can show days in Arabic or English. The Islamic week begins on Sunday in most calendar systems, though some start on Saturday. Friday (Jumu'ah) is the holy day of the week in Islam and is often highlighted.

Step 3: Find Important Dates

Look for marked dates indicating Islamic events:

• Crescent symbols (☽) often mark the beginning of new months
• Star symbols or colored cells highlight Islamic holidays
• Special colors may mark Sunnah fasting days (White Days, Mondays, Thursdays)
• Text labels identify events like "Eid al-Fitr" or "Day of Arafah"

Step 4: Read the Dual Dates

For each day, note both the Hijri date (small number) and the Gregorian date (large number). This tells you: "On Gregorian date [X], it is Hijri date [Y]."

Key Islamic Dates to Look for in a Hijri Calendar

Here are the most important dates Muslims track in the Hijri calendar:

• 1 Muharram: Islamic New Year
• 10 Muharram: Day of Ashura (voluntary fasting)
• 12 Rabi al-Awwal: Mawlid al-Nabi (Prophet's birthday)
• 27 Rajab: Isra Mi'raj (Night Journey)
• 15 Sha'ban: Night of Bara'at
• 1-30 Ramadan: Ramadan fasting
• Last 10 nights of Ramadan: Including Laylat al-Qadr
• 1 Shawwal: Eid al-Fitr
• 9 Dhul Hijjah: Day of Arafah (voluntary fasting)
• 10 Dhul Hijjah: Eid al-Adha
• 11, 12, 13 Dhul Hijjah: Days of Tashreeq

Understanding Fasting Day Markers

Good Islamic calendars mark the following voluntary fasting days:

• Ayyam al-Bid (White Days): The 13th, 14th, and 15th of every Hijri month
• Monday and Thursday: Weekly Sunnah fasting (marked on some calendars)
• Ramadan: All 29 or 30 days
• 6 Days of Shawwal: After Eid al-Fitr
• 10 Muharram (Ashura)
• 9 Dhul Hijjah (Day of Arafah)

Why the Calendar Starts on Saturday or Sunday

Different cultures start their week on different days. Islamic calendars from the Arabian Peninsula often start the week on Saturday or Sunday, while those from Indonesia and Malaysia may use the standard Monday-Sunday format with Friday highlighted. Always check which day your calendar treats as the first day of the week.

Converting Hijri Dates to Gregorian Dates

If you encounter a Hijri date and need to know the Gregorian equivalent, you can:

1. Use an online Hijri to Gregorian date converter
2. Refer to a dual-date Islamic calendar
3. Use a dedicated Islamic calendar app

Remember that the result may vary by ±1-2 days depending on which calculation method is used and whether local moon sighting differs from calculated dates.

Frequently Asked Questions

How do I find today's Hijri date?

You can use a Hijri date tool online (like HijriGuide.com's Today's Hijri Date page), a Hijri calendar app, or a dual-date calendar. The Hijri date for any given Gregorian date can also be calculated using a date converter.

Why does the Hijri calendar have different year numbers than the Gregorian?

The Hijri calendar uses a different starting point. While the Gregorian calendar counts from approximately the birth of Jesus Christ (year 1 CE), the Hijri calendar starts from 622 CE — the year of the Prophet Muhammad's migration to Medina. This means the Hijri year is currently around 578 years behind the Gregorian year number.

What does "1447 H" mean?

"1447 H" means the 1447th year of the Hijri calendar (Anno Hegirae). This corresponds approximately to the Gregorian years 2025–2026 (since Hijri years don't align with Gregorian year boundaries).

Are Hijri dates the same worldwide?

Not always. Different countries may start each Hijri month on different Gregorian dates, depending on whether they use local moon sighting, global moon sighting, or astronomical calculations. This can result in Islamic holidays like Eid being celebrated on different days in different countries.