The Islamic calendar has several impacts on trading activity and stock returns in the Karachi Stock Exchange (KSE). During the holy month of Ramadan, trading hours are reduced as Muslims avoid speculation and gambling. On Eid-ul-Fitar, food and clothing prices rise as people celebrate, decreasing stock market volatility. After Eid-ul-Azha, consumption increases and savings decrease as animals are slaughtered to follow tradition. The mourning month of Aashoora is also observed, which impacts trading.