: Unorthodox customs such as celebrating birthday or happy birthday and offering special prayers , salutations or gifts on that day, counting the years according to age , lighting candles and blowing it out and then cutting the cake ; It is not valid for Muslims. The Prophet (peace and blessings of Allaah be upon him) said , " Whoever adheres to a nation belongs to that nation." (Sahihul Jame H / 6025) Islam is a complete way of life , there are certain rules of mourning in Islam. That is, if someone dies, they will mourn for three days. There is no chance of mourning after three days , but will live a normal life from the fourth day , but if the husband dies, the wife will mourn for four months and ten days or until the child is born (if any). The Prophet (peace and blessings of Allaah be upon him) said: 'A woman who believes in Allaah and the Hereafter should not mourn for three more days, but when her husband dies she should mourn for four months and ten days. (Bukhari , Muslim). Therefore, the rule of Islam is that no one should mourn for more than three days. Only women will mourn the death of their husband for four months and ten days or till the child is born. In Islam, there is no provision for performing kulkhani on the fourth day of death and chehlam on the fortieth day. It is not in Islam to observe the day of death in this way, to make special arrangements for prayers and milads on the occasion of the day of death, and to observe the day of mourning anew. All that is required in Islam for the dead is to pray for them at all times .