Rubuta ci gaba don wannan sakin layi - An fara harbi a Birnin New York a ranar 15 ga Yuli, yana rufe yankuna a ciki da kewaye da gundumomi biyar da kuma a Long Island. An yi fim din titin da Aman da Naina suke zaune a Brooklyn, inda rukunin suka yi zango na makonni biyu a gidajen gida. An yi amfani da mutum biyu don yanayin tseren Zinta a lokacin da aka fara fim din, tun da ta ji rauni yayin harbi. Rashin wutar lantarki na Arewa maso gabas na 2003
ya tilasta wa ƙungiyar ta soke wasu fim. Shirin harbi a Birnin New York ya ɗauki kwanaki hamsin da biyu. An yi fina-finai na karshe, wanda ya hada da wasu waƙoƙi, a Filmistan Studios a Mumbai a cikin kimanin kwanaki hamsin da suka fara a watan Agusta 2003. An kammala harbi a watan Oktoba 2003, "Maahi Ve" shine wasan karshe da aka yi fim. A cewar Shah Rukh Khan, "Kal Ho Naa Ho" an yi shi ne a cikin sauti na sauti kamar yadda akwai abubuwa da yawa a cikin fim din. Ya lura cewa sautin aiki tare "ya inganta" aikinsa "sosai" yana bayyana shi a matsayin "ɗaya daga cikin manyan albarkatu ga ɗan wasan kwaikwayo".