I've seen two different versions of the song here, none accurate.
Try this one out.
C Am Em
Har Ghadi Badal Raha Hai Roop Zindagi
C Am Em
Chaav Hai Kanhi, kanhi Hai Dhoop Zidnagi
F
Har Pal Yahan
C
Jee Bhar Jiyo
F
Jo Hai Sama
G
Kal Ho Na Ho
Har Ghadi Badal Raha Hai Roop Zindagi
Chaav Hai Kahhi Hai Dhoop Zidnagi
Har Pal Yahan
Jee Bhar Jiyo Jo Hai Sama
Kal Ho Na Ho