Will changing an events Time-Zone affect other people on shared events?

Will changing an events Time-Zone affect other people on shared events?

If I were to normalize an EKEvent 's startDate property using a
NSFormatter or by setting the time zone with
NSDateFormatter *formatter = [[NSDateFormatter alloc] init];
[formatter setDateFormat:@"hh:mm a"];
[formatter setTimeZone:[NSTimeZone systemTimeZone]];
event.startDate = [formatter dateFromString:[NSString
stringWithFormat:@"%@", [event.startDate]]];
and I later make a change to that event requiring me to call
[self.event.eventStore saveEvent:currentEvent span:EKSpanThisEvent
commit:YES error:nil];
Would it override the time-zone on the server, causing issues for the
person (whom uses GCal) in another state that originally created that
shared calendar event, or is it just a local change?