There are several Muslim countries that feature the crescent moon symbol on their national flag. See them and find out more about them here.
Why do some countries use the Crescent and Star as an 'Islamic symbol' on their flags even though it has nothing to do with Islam? - Quora
Flag of Mauritania, History & Meaning
What do we know?What do we want to know? What did we learn? K.W.L Chart. - ppt download
Flags of Muslim Countries With a Crescent Moon
Muslim Countries Flags Stock Illustrations – 107 Muslim Countries Flags Stock Illustrations, Vectors & Clipart - Dreamstime
Crescent moon flag hi-res stock photography and images - Alamy
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Crescent and star hi-res stock photography and images - Alamy
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Why don't the Arab countries have crescent moon and stars on their flags, despite being Islamic? - Quora
countries have moon on their flags: Do you know how many countries have moon on their flags? Let's find out
National Flags Featuring the Crescent Moon Symbol