Why Ayyam?
Many age calculators subtract one year from another, or are English tools translated without real Hijri support. Ayyam (“days” in Arabic) is built the other way round:
- Both calendars, everywhere: Umm al-Qura Hijri and Gregorian in every tool.
- Proper Arabic, with correct counted-noun grammar and a choice of Arabic or Western digits.
- Transparency: every rule is published on the Methodology page.
- Privacy: calculations run in your browser; we do not collect birth dates.
Who is behind Ayyam?
Ayyam is run by an independent developer based in Saudi Arabia, who writes the content, builds the tools, checks their numbers and keeps them up to date. The site launched in September 2026 and is not backed by an ad network or any official body. To reach us directly, use the contact page; we post date reminders on X, Instagram and Pinterest.
How we prepare and check content
- Writing and review: we use AI tools to help draft and organise some of the text, and the site owner reviews it before publishing. Every number or date quoted on the pages is checked by automated tests against what the tools’ own engines calculate, and nothing that disagrees is published.
- Reliable sources: Hijri dates follow the Umm al-Qura calendar built into modern browsers. Salary and support payment dates come from the official bodies’ tables and announcements, end-of-service rules from the official text of the Labor Law, and the school calendar from the Ministry of Education. Pages that rely on an official source link to it.
- Automated tests: before any update is published, the tools run through hundreds of automated tests, including checks on the numbers quoted in the pages’ examples; if a number does not match what the tool calculates, publishing stops until it is fixed.
- Kept up to date: every page shows when it was last updated. Occasion and payday pages work out their dates from today automatically, and official tables are reviewed when new ones are published.
- Corrections: if you report an error, we check it, fix it if confirmed, and update the page’s date.
What we offer
Age
- Age Calculator and Hijri Age Calculator
- Age by Birth Year and Age Difference Calculator
- Birth Date & Weekday
Calendars
- Today’s Date in Hijri and Gregorian and Hijri–Gregorian Converter
- Hijri Calendar and Hijri Years Table
- Gregorian Months and Coptic Calendar
Occasions and dates
- Countdown to Ramadan & Eid and Ramadan & Eid Dates
- Saudi Payday Countdown and Saudi Public Holidays
- School Calendar
- Countdown to Winter
Work and life
- End of Service Calculator and Overtime Calculator
- Working Days Calculator
- Pregnancy Calculator and Ovulation Calculator
Dates and times
- Date Difference and Date Calculator
- Hours Calculator and 24-Hour Clock Converter
- Time Units Converter and Day & Week Number
There are also articles that explain the calculations with worked examples. New tools are added only once they are complete and tested.
Limits
- Hijri dates on this site follow the Umm al-Qura calendar used in Saudi Arabia and may differ by a day from countries that start months by local moon sighting. Ramadan and Eid dates are estimates until the crescent sighting is announced.
- The pregnancy calculator gives estimates and is no substitute for a doctor, and the end-of-service calculator estimates the award from the Labor Law text and is not legal advice.
What we are not
Ayyam is independent and not affiliated with any government body. For official matters, rely on the dates in your documents and the relevant authority.
Feedback
Found a result that looks wrong, or have an idea for a useful tool? Please contact us and include the dates you entered and the result you saw.
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