Nowadays , in some countries such as Afghanistan , Iran , Iraq , Lebanon , Bahrain , and Pakistan , the Commemoration of Husayn ibn Ali has become a national holiday and most ethnic and religious communities participate in it .
In some Shi'a regions of Muslim countries such as Afghanistan , Iran , Iraq , Turkey , Azerbaijan , Pakistan , Lebanon , and Bahrain , the Commemoration of Husayn ibn Ali has become a national holiday . Most ethnic and religious communities participate in it .