Age of Imam al-Mahdi at Reappearance

Allah (SWT) knows when Imam Al-Mahdi (As) will come back to public life. Allah only knows his age then. We know that his age now is 1187 years and 44 days as we are in 29 of the month of Ramadan 1442 as he was born in Samarra in 15th of Asha'ban in year 255 after Hijra. 'When he will re appear,bye will look like a man in his forties according to Hadeeth. 'Wassalam.