The Twitterverse is filled with Ramadan Kareem greetings on the first day of Ramadan 2013. Here are 10 things to know about this Islamic month.

Ramadan Kareem 2013: Overview and Answers to FAQs

10. Ramadan is the ninth month of the Islamic calendar, which follows the lunar cycle.

9. The beginning of Ramadan falls on the night the crescent new moon is first sighted. Throughout the month, or until the next crescent new moon, Muslims will be observing Ramadan.

8. Ramadan 2013 begins on July 9. Eid al-Fitr, the day after the last day of Ramadan, will be announced on the next crescent moon.

7. Ramadan is observed by acts of introspection, self-discipline, and fasting. Sexual relations as well as drinking and smoking are expected to be stopped during this holiday.

6. Taken literally, Ramadan (ramida or ar-ramad) means scorching heat. It is said the first verses of the holy Quran were revealed to Muhammad on this month.

5. In relation to introspection, charity becomes the focus of Muslims during Ramadan. Good deeds during Ramadan are believed to have a stronger impact that in any other month of the year.

4. Ramadan Mubarak or Ramadan Kareem means, "Have a blessed Ramadan."

3. Turkish expats and Muslims in Australia are sending aid parcels to be sent to poor Muslims throughout the world, reports World Bulletin.

2. Children are not required to fast during the month Ramadan, but some families encourage moderation during Ramadan than in any other month. Those who are pregnant and lactating, as well as those seriously sick, are also understood to observe Ramadan in ways other than strict fasting.

1. Ramadan is one of the Five Pillars of Islam. These five fundamental Islamic practices include: belief in the holy teachings, worship of Allah, charitable giving, fasting during Ramadan, and pilgrimage to Mecca (hajj) at least once in a lifetime.

Dr Ibrahim Abu Mohammad, the Grand Mufti of Australia, has released a statement in observance of Ramadan.

"We ask Allah to make our future better than our past, and turn our situations into the better," his statement said. "Have a blessed month, and may your acts of worship be accepted by Allah."

U.S. President Barack Obama also released a statement for the Muslims around the world.

"I wish Muslims across America and around the world a month blessed with the joys of family, peace and understanding. Ramadan Kareem," Obama said.

Ramadan Kareem. Ramadan Mubarak. 'Start' the slideshow for some Ramadan greetings on Twitterverse.

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