Muslims pray on the first Friday of Ramadan at the Muhammad al-Amin Mosque on June 2.
Muslims offer prayers on Friday.
Ramadan is the ninth month in the Islamic calendar and it is believed that the Quran's first verse was revealed during its last 10 nights.
A man offers prayers on Friday.
Ramadan is traditionally a time of reflection and prayer, and Muslims are expected to abstain during daylight hours from food, drink, smoking and sex to focus on spirituality, good deeds and charity.
Faithful listen to a sermon on Friday.
A boy watches the faifthul pray on Friday.
Men lie down after praying at Istiqlal Mosque on Friday.
A boy watches as others pray on Friday.
A girl walks inside Ibn Tulun Mosque on Friday.
A Palestinian boy plays with fireworks as he celebrates the start of Ramadan on May 31.
The fast presents a physical and spiritual challenge every year, but particularly when the holiday falls during harsh Mideast summer when the days are longest and temperatures soar in some places to 120 degrees Fahrenheit.
Srinagar, Indian-controlled Kashmir
Boys read the Quran at Markaz Al-Madrasa Al-Islamia, an Islamic seminary and orphanage, on May 30.
East Java, Indonesia
Students read the Quran at an Islamic boarding school on May 30.
Manalapan, New Jersey
Hager Elhariry high-fives family friend Ali Ghonaim as the Egyptian-American family takes part in the Iftar dinner to break their Ramadan fast on May 28.
A Palestinian man reads from the Quran on May 31.
A boy wait to break his fast at a charity food distribution point on May 29.
A woman reads the Quran in a mosque on May 29.
A boy reads the Quran at a madrassa, or religious school, on May 29.
Children wait to break their fast outside a mosque on May 28.
A boy carries raw Ramadan pastries prior to baking in the rebel-held Damascus suburb on May 28.
Women look at their cell phones after breaking fast on May 27 in front of the Blue Mosque.
Boys read the Quran in a madrassa on May 28.
New York City
A man rests after breaking fast and performing the Maghrib sunset prayer on the first day of Ramadan at the Islamic Cultural Center in Manhattan on May 27.
Muslims arrive to offer the first "Taraveeh" (special night prayers) at Mecca Masjid on May 27, ahead of the start of Ramadan.
Muslims pray to mark the start of Ramadan on May 27.
Muslims pray on the first day of Ramadan at Istiqlal Mosque on May 26.
An official uses a telescope to look for the new moon that will signal the start of Ramadan on May 26. Because of differences over how the new moon is spotted, some countries declare the start of Ramadan a day later than others.