To create any date with your own values, do this:
NSCalendar* calendar=[NSCalendar currentCalendar];
NSDateComponents* dateComps=[[NSDateComponents alloc] init];
[dateComps setYear:1990];
[dateComps setMonth:11];
[dateComps setDay:10];
NSDate* starDate=[calendar dateFromComponents:dateComps];
EKEventStore *store = [[EKEventStore alloc] init];
[store requestAccessToEntityType:EKEntityTypeEvent completion:^(BOOL granted, NSError *error) {
if (!granted) { return; }
EKEvent *event = [EKEvent eventWithEventStore:store];
event.title = @"Hits THermal DC I";
event.startDate = starDate
event.endDate = [event.startDate dateByAddingTimeInterval:60*60]; //set 1 hour meeting
[event setCalendar:[store defaultCalendarForNewEvents]];
NSError *err = nil;
[store saveEvent:event span:EKSpanThisEvent commit:YES error:&err];
NSString *savedEventId = event.eventIdentifier; //this is so you can access this event later
}];