Want to learn more about Ramadan? Take this quiz.

The World
Ramadan Egypt lantern

A woman with her daughter look at a stall selling festival lights and Ramadan lanterns, or "fanoos Ramadan", at Sayida Zienab district market during the first day of Ramadan in old Cairo, Egypt June 6, 2016. 

Amr Abdallah Dalsh/Reuters

Millions of Muslims worldwide have started to observe the holy month of Ramadan. Many only know Ramadan as a month of fasting for Muslims. But, of course, Ramadan is much more.

Sadiq Khan, London's first Muslim mayor, who was elected in March, saw Ramadan as "a great opportunity to do things in the community and break down the mystique and suspicion around the religion."

"So, I’m making it a priority this month to get out there and build bridges by hosting Ramadan meals around the city at synagogues, churches and mosques," he said in an opinion piece published in the The Guardian.

If you want to know more about Ramadan, or prove that you're an expert, try this quiz.