Abstract
This study investigates Islamic calendar anomalies in Pakistan Stock Exchange (PSX), using KSE-100 Index data over the period 1991-2014. The findings show significant volatility of stock returns during Islamic months of Safar, Rabbi-ul-Awwal and Zil-hajj. However, there is no evidence of abnormal returns in any Islamic month. These findings do not provide a compelling evidence of Islamic calendar anomalies in Pakistani market.