simple relativity question

two people are on a train, they will set their clock, on opposite ends of the train, to 12:00 when a flash is seen emitted from a bulb at the centre of the train, equidistant from each person. An observer watches from a platform, and says that the two events of setting the clock were NOT simultaneous while another observer says that they were. Since each viewpoint is equally valid, when the the people step off the train, what will their clocks actually read? is there a discrepancy or not?

>>1

You should realize that the train would be very far away from the platform, and that both viewpoints are valid. Something that is 1 light year away from us is also 1 year in the past.

It's also a consequence of relativity that two simultaineous events in a particular inertial (0 acceleration) frame of reference are not neccesarily simultaneous in another inertial frame of reference. That is just how space-time works.