Accurate Islamic Calendar and Holy Dates Since 1970 till 2050
The Islamic calendar, known as the Hijri calendar, is a purely lunar calendar of twelve months, each beginning with the sighting of the new crescent moon. Unlike the Gregorian calendar, it does not add leap days or intercalary months to stay aligned with the solar year, which means the Hijri year runs roughly ten to eleven days shorter than a solar year — this is why Ramadan, Hajj, and other Islamic dates shift steadily earlier through the Gregorian calendar year after year, moving through all four seasons over a cycle of about 33 years.
The Hijra: Why the Calendar Starts Where It Does
The calendar's starting point, year 1 AH ('Anno Hegirae'), marks the Hijra — the migration of the Prophet Muhammad PBUH and his companions from Mecca to Medina in 622 CE. It was formally adopted as the Islamic calendar's epoch during the caliphate of Umar ibn al-Khattab, roughly seventeen years after the Hijra itself, when the growing Muslim administration needed a consistent dating system for official records.
Why the Hijra, Specifically
The choice of the Hijra rather than, say, the Prophet's PBUH birth or the start of revelation was deliberate — it marks the moment the Muslim community became a functioning, self-governing society, not just a religious movement. Umar's decision reflected a practical, administrative logic as much as a spiritual one: a dating system anchored to the founding of the first Muslim polity, not to a single individual's biography.
The Twelve Hijri Months
Each of the twelve Hijri months carries its own historical and spiritual weight.
- Muharram opens the year and includes the Day of Ashura.
- Rabi-ul-Awwal is associated with the birth of the Prophet PBUH.
- Rajab, Dhul-Qadah, Dhul-Hijjah, and Muharram together make up the four sacred months in which warfare was historically prohibited.
- Ramadan is the month of obligatory fasting.
- Dhul-Hijjah contains both the Hajj pilgrimage and Eid al-Adha.
Because the calendar is lunar, the exact start of each month depends on moon sighting, which is why you'll sometimes see a one-day variation in when Ramadan or Eid is observed between different regions and moon-sighting committees.
Converting Between Hijri and Gregorian Dates
Our calendar tool converts between Hijri and Gregorian dates across a wide historical range, letting you look up what the Islamic date was on a specific past day, or find the projected Hijri date well into the future — useful for anything from checking the date of a family member's birth on the Islamic calendar to planning years ahead for Hajj or a Ramadan trip. Because the lunar cycle is astronomically predictable even though local moon-sighting announcements can vary by a day, calculated Hijri dates give a reliable estimate, with actual observed dates confirmed closer to the time by relevant moon-sighting authorities.
Prayer Times and the Monthly Calendar
Alongside dates, we surface local prayer times so your daily schedule and your monthly calendar stay in sync — useful especially around Ramadan, when Suhoor and Iftar timings shift a little every single day as the month progresses.
Tracking the Sunnah Fasts
It's also worth using the calendar to track the recommended Sunnah fasts that fall outside Ramadan: the White Days (the 13th, 14th, and 15th of each Hijri month), the Day of Ashura in Muharram, and the fasting recommended in the first ten days of Dhul-Hijjah — small, consistent acts that are easy to miss without a lunar-aware calendar to flag them.
Whoever fasts six days in Shawwal after Ramadan, it is as if they fasted the entire year. — a Hadith frequently used to explain why the calendar tool flags recommended fasting days beyond Ramadan itself.
A Shared Global Rhythm
There's a genuine sense of unity in knowing that Muslims across the globe are tracking the same lunar cycle and observing the same sacred months at roughly the same time, even across vastly different time zones and cultures. We built this calendar tool to make that shared rhythm easier to follow day to day, whether you're counting down to Ramadan, checking when the next sacred month begins, or simply trying to remember what today's Islamic date is.
We keep this section updated with accurate conversions and clear explanations of what each month and date means. Thank you for using this calendar to stay connected to the lunar rhythm that has structured Muslim life for close to fourteen centuries.
Reading a Hijri Date Correctly
A Hijri date is written as day, month name, and year followed by "AH" (Anno Hegirae) — for example, 1 Muharram 1447 AH. Unlike Gregorian dates, the Islamic day begins at Maghrib (sunset) rather than midnight, a convention rooted in the lunar basis of the calendar itself: since months begin with the sighting of the new crescent, which becomes visible near sunset, it made practical sense for the day to follow the same starting point.
Moon Sighting vs. Calculated Dates
There are two broad approaches to determining the start of a Hijri month: physical moon sighting, where local religious authorities confirm the crescent has actually been observed, and astronomical calculation, where the moon's position is predicted mathematically in advance. Many countries and communities use a mix of both — relying on calculation for planning purposes, but deferring to sighting committees for the final, authoritative announcement, particularly for Ramadan and the two Eids. This is the single biggest reason you'll sometimes see Ramadan or Eid observed on different days in different countries, even though the underlying astronomical event is the same worldwide.
The Four Sacred Months in Detail
Islamic tradition designates four months as sacred: Dhul-Qadah, Dhul-Hijjah, Muharram, and Rajab. Historically, warfare was prohibited during these months across pre-Islamic and early Islamic Arabia, allowing trade caravans and pilgrims to travel safely. Three of the four fall consecutively (Dhul-Qadah, Dhul-Hijjah, Muharram), surrounding the Hajj season, while Rajab stands alone roughly midway through the year.
Dhul-Hijjah and Hajj
Dhul-Hijjah is arguably the most significant of the twelve months for the global Muslim community, containing both the Hajj pilgrimage to Mecca and Eid al-Adha. The first ten days of this month carry particular recommended significance, with fasting especially encouraged on the 9th day (the Day of Arafah) for those not performing Hajj.
Muharram and Ashura
Muharram opens the Hijri year and contains the Day of Ashura (the 10th of Muharram), a day of historical and spiritual significance across the Muslim world, associated with recommended fasting and, for many communities, additional commemorative significance.
Using the Calendar for Long-Term Planning
Because our tool projects Hijri dates well into the future, it's genuinely useful for planning ahead — estimating which Gregorian month Ramadan will fall in several years out, for instance, which matters for anyone budgeting time off work or planning a Hajj trip years in advance. Keep in mind that far-future projections are calculated estimates; the final, authoritative date for any given year is always confirmed closer to the time through actual moon sighting.
Historical Range and Everyday Use
Our calendar tool covers a wide historical range stretching from 1970 through 2050, letting you look up a specific past date — useful for checking the Hijri date of a birth, a marriage, or another significant family event — as well as look ahead for future planning. Whether you're confirming today's date or converting a date decades in either direction, the same underlying lunar calculation drives the result.