Muslims around the world began observing Ramadan on Monday. During the Islamic holy month of fasting and spiritual reflection, Muslims are not allowed to eat or drink between sunrise and dusk.

Egyptian Muslims pray in a mosque on the first day of Ramadan in Cairo, Egypt, on June 6, 2016.

A Palestinian makes traditional sweets in a market in Gaza City, on the first day of the Muslim fasting month of Ramadan, on June 6, 2016.

Pakistani Muslims perform a special "Taraweeh" prayer on the eve of the Muslim fasting month of Ramadan in eastern Pakistan's Lahore on June 6, 2016.

A Syrian salesman stands behind his assorted nuts stall at the Midan marketplace in Damascus, capital of Syria, on June 6, 2016.

A Syrian boy holds a handful of dates he sells at the Midan marketplace in Damascus, capital of Syria, on June 6, 2016.

 Palestinian Muslim worshippers pray in front of the the Dome of the Rock at the al-Aqsa Mosque compound in Jerusalem during "tarawih" prayer marking the first evening of Islam's holy month of Ramadan, on June 6, 2016.

A man makes the Doner Kebab at a restuarant in Khan el-Khalili after the fasting in Cairo, Egypt, June 6, 2016.

Iranian women pay respect to the graves of Iranian soldiers ahead of the upcoming Muslim holy fasting month of Ramadan in Tehran, Iran, June 6, 2016.

People shop at Tajrish bazaar ahead of the upcoming Muslim holy fasting month of Ramadan in Tehran, Iran, June 6, 2016.

A Palestinian man reads Quran at a Mosque in Gaza City on the first day of the Muslim fasting month of Ramadan, on June 6, 2016.