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NSDateComponents *_comps = [[NSDateComponents alloc] init]; [_comps setDay:23]; [_comps setMonth:3]; [_comps setYear:2014]; NSCalendar *gregorian = [[NSCalendar alloc] initWithCalendarIdentifier:NSGregorianCalendar]; NSDate *_date = [gregorian dateFromComponents:_comps]; NSDateComponents *weekdayComponents = [gregorian components:NSWeekdayCalendarUnit fromDate:_date]; int _weekday = [weekdayComponents weekday]; NSLog(@"_weekday::%d",_weekday);