For the most part, Sunnis and Shias observe Ramadan the same way, but there are some differences. For one, Sunnis break their fast at sunset, once the sun is no longer visible, but there is still light in the sky. However, for Shias they wait to break after it gets completely dark. Shia Muslims also observe additional events that Sunnis do not. They mourn for three days (on the 19th, 20th, and 21st) to commemorate Ali, the son in law of Muhammad and first Imam of the Shia, who was assassinated by Abd al-Rahman ibn Muljam.
