How does the Ramadan countdown work?
This countdown calculates the time remaining until the next Ramadan begins, using an arithmetic conversion (a tabular Hijri calendar) between the Hijri and Gregorian calendars, running entirely in your browser with no server involved.
The countdown updates automatically every second, and shows the expected start date of Ramadan in both the Hijri and Gregorian calendars.
How accurate is the date shown?
The official Hijri calendar (the Umm al-Qura calendar used in Saudi Arabia) relies on actual moon-sighting or precise astronomical calculations of the moon's position, and the start of the month can differ by a day depending on the country or the announcing authority.
A margin of one to two days This calculation uses a tabular (arithmetic) algorithm to approximate the start of the Hijri month — a widely used method, but one that does not always match the official moon-sighting announcement. Treat the date shown as an approximation, and check your country's official announcement as the month approaches.
Why does the start of Ramadan vary between countries?
- Moon sighting: some countries rely on direct visual sighting of the crescent moon, which may be visible in one country and not another a night earlier or later.
- Astronomical calculation: other countries rely on pre-calculated astronomical data instead of direct sighting, fixing the date in advance.
- Geographic longitude: a country's location can make the crescent visible there a full day before it is visible elsewhere.
This is why you may see a one-day difference between Saudi Arabia's announcement and other countries' — a normal, recurring occurrence every year.
Frequently asked questions
Is the date shown the official confirmed date?
No, it is an estimate based on an approximate astronomical calculation (a tabular Hijri calendar), and may differ by one or two days from the official announcement based on moon sighting in your country.
When is the official start of Ramadan announced?
Official bodies (such as religious courts or astronomical authorities) typically announce the date one or two nights before the month begins, after attempting to sight the crescent moon.
Does the countdown work offline once the page is open?
Yes, once the page has loaded the countdown runs entirely in your browser and does not need a continuous internet connection.
Is my data or location stored?
No, the tool does not request or store any personal data or location; the calculation relies only on your device's date and time.
What happens if I open the page during Ramadan itself?
The countdown shows you the current day number of Ramadan instead of counting down the days until it begins.
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