South Africa's Zuma says not stressed by opposition marches

JOHANNESBURG (Reuters) - South African President Jacob Zuma said he was not stressed by calls for him to resign and urged his supporters to ignore the criticism directed against him, hours after more than 30,000 people marched in the capital demanding he quit. Zuma has faced protests following a much-criticised cabinet reshuffle last month but the president appeared jovial at his 75th birthday celebrations, dancing and cracking jokes. "The opposition are doing their job, don't be worried," he told his supporters in the Zulu language. "Do not be worried by the opposition marches." (Reporting by Lynette Ndabambi; Writing by James Macharia)