CNN
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You might already know that roughly a quarter of the world’s population is expected to head into Ramadan this weekend, the Islamic holy month perhaps best known for its followers’ dawn-to-sunset abstinence of food and liquids.
What you might not realize if you’re not a follower: Muslims tentatively know when it’s coming up, but they may get a notice of mere hours of when Ramadan officially starts.
Further, it’s not uniformly observed around the world — the start date can vary country to country and can even be different mosque to mosque in the same city. But what unites all Muslims is the observance of the new crescent moon in the ninth month of the…
