https://ift.tt/2wwdHAe To Get All the World’s Muslims to Hajj, It Would Take at Least 581 Years Muslims and Islam, Pilgrimages Because of yearly caps, it would be impossible for Islam’s 1.8 billion worshipers to all make the pilgrimage to Mecca, a once-in-a-lifetime obligation. SARAH ALMUKHTAR https://ift.tt/2nZRfsd August 23, 2018 at 05:30AM