Morocco holds a referendum on a revised constitution that King Mohammed has offered to placate "Arab Spring" street protesters.

Morocco holds a referendum on Friday on a revised constitution that King Mohammed has offered to placate "Arab Spring" street protesters.

Here is a timeline on Morocco since the king came to the throne.

July 23, 1999 - King Hassan II dies from a heart attack and his son Mohammed VI ascends to the throne.

May 16, 2003 - Suicide bombers set off five blasts in Casablanca. Forty-five people are killed including 13 of the bombers and about 60 are wounded.

Oct. 2003 - King Mohammed says he will reform family law, protecting women's rights in marriage, allowing them to seek divorce and raising their minimum marriage age to 18 from 15.

Dec. 16, 2005 - The Arab world's first truth commission says about 592 Moroccans were killed at the hands of the government between the 1960s and 1990s, a period known as "the years of lead". Victims and their families are compensated but none of the killers is named or punished.

Sept. 7, 2007 - With a record low voter turnout of 37 percent, the conservative Istiqlal party wins most seats at a parliamentary election and Abbas El Fassi is named prime minister.

Nov. 6, 2007 - King Mohammed criticises Spanish King Juan Carlos's visit to the disputed enclaves of Ceuta and Melilla.

Nov. 6, 2009 - calls for action against traitors who threaten the country's "territorial integrity", a direct warning to Western Sahara independence campaigners in a speech marking 34 years since Morocco took control of the territory.