Calling out to Imam Mahdi(ajtfs), It is recommended to recite this on Fridays & the 4 Idd days; the Idd ulFitr (1st Shawwal), the Idd al-Azha day (10th of Dhu’l-hijjah), the `Eid al-Ghadir day (18th of Du’l-hijjah).