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Twitter’s Automatically Adding a Crescent Moon to Ramadan Tweets

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Ramadan began Saturday, and it seems like everyone has since known to insert a crescent moon icon in their tweets about the holy month of fasting — including Hassan Rouhani, the President of Iran:

In reality, Twitter automatically adds the icon after the hashtag Ramadan–and it adds a separate icon after the hashtag Eid, the holiday that marks the end of Ramadan. It announced the new feature in a post to its blog last week. The icon only appears on Twitter web and its official apps.

The social media site has used a similar “hashflag” for the World Cup:

Twitter will also let you know when to start and end your fast if you tweet at @AlArabiya with the hashtags #iftar or #imsak and the name of your city after a hashtag.

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Write to Noah Rayman at noah.rayman@time.com