Guides
Islamic calendar guides
Short, plain-English answers to the questions people actually ask about the Hijri calendar — written by Bilal Ahmed, who keeps one of these calendars on his desk.
Why Hijri Dates Differ Between Countries The moon, the math, and why two countries can start Ramadan on different days — and both be right. Umm al-Qura vs Moon Sighting, Explained What Saudi Arabia’s official calendar is, what it isn’t, and when to trust it over the arithmetic. When Is Ramadan 2027? Ramadan 1448 is expected to begin 8 February 2027 — the honest answer, with the moon-sighting caveat.
Start with the tools
Reading about the calendar is good; using it is better. Convert a date, check today's Hijri date, or see exactly how we calculate — including why we show two methods instead of one confident number.
