The cornerstones of Islam are five and must be fulfilled in every Muslim:
1. The testimony that
"there is no God but Allah and Mohammad is the messenger of Allah"
2. Prayers
each Muslim must pray five times a day
3. Zakaa
The arabic word for "purification" and refers to an obligation that the rich pay specified
amounts of money for the poor
4. Fasting
during the month of Ramadan (Lunar calendar)
5. Hajj (pilgrimage)
visiting the Holy Mosque in Mecca where the "Kaaba" exists during a specific
time of the year and performing certain proceedings.
It is mandated once in life for those who can afford it.