"On this day I urge everyone to work in the spirit of tolerance, mutual accommodation and respect for dissent and invite everyone to participate in the national effort for ... reconciliation and healing the wounds," Zardari said.

Chaudhry was removed in 2007 by Pervez Musharraf, the former president, after he began examining cases that could have threatened Musharraf's legitimacy as he sought a new term in office.

Zardari agreed last week to reinstate the chief justice, after activist lawyers and opposition supporters began a march toward Islamabad, the capital, where they planned to stage an indefinite sit-in at parliament.

Zardari had repeatedly stalled over the issue, apparently due to fears that Chaudhry would examine a deal that granted him immunity from prosecution over corruption claims.