Editor’s note: Sign up for Unlocking the World, CNN Travel’s weekly newsletter . Get news about destinations, plus the latest in aviation, food and drink, and where to stay. CNN  —  There are more than 8 billion people in the world. And about a quarter of them are fasting from sunup to sundown. Every day. For an entire month. It’s Ramadan , and it’s the holiest month of the Muslim calendar. In 2025, it runs roughly from February 28 to March 30. But what if you’re not a Muslim and instead just a