How to change the first day of the week to monday in week view about tapkulibrary HOT 2 OPEN

- (void) _setupView{
    	self.nowLineView = [[TKNowView alloc] init];
	NSDateComponents *info = [[NSDate date] dateComponentsWithTimeZone:self.calendar.timeZone];
    info.weekday = 2;
	info.hour = info.minute = info.second = 0;
	self.formatter = [[NSDateFormatter alloc] init];
    self.formatter.timeZone = self.calendar.timeZone;
	self.eventGraveYard = [NSMutableArray array];
    self.backgroundColor = [UIColor whiteColor];
    self.clipsToBounds = YES;
    self.pages = [NSMutableArray arrayWithCapacity:3];
    self.weekdayPages = [NSMutableArray arrayWithCapacity:3];
    [self addSubview:self.horizontalScrollView];
	info.day -= 1;
	for(NSInteger i=0;i<3;i++){
		NSDate *date = [NSDate dateWithDateComponents:info];
		CGRect r = CGRectInset(self.horizontalScrollView.bounds, HORIZONTAL_PAD, 0);
		r.origin.x = CGRectGetWidth(self.horizontalScrollView.frame) * i + HORIZONTAL_PAD;
		r.origin.y = 0;
		CGRect rr = r;
		rr.origin.x = 0;
		UIScrollView *sv = [[UIScrollView alloc] initWithFrame:r];
		sv.autoresizingMask = UIViewAutoresizingFlexibleWidth;
		sv.clipsToBounds = NO;
		sv.tag = i;
		sv.contentSize = CGSizeMake(0, TIMELINE_HEIGHT);
		sv.alwaysBounceVertical = TRUE;
		sv.backgroundColor = [UIColor whiteColor];
		[self.horizontalScrollView addSubview:sv];
		TKTimelineView *timelineView = [[TKTimelineView alloc] initWithFrame:sv.bounds];
		timelineView.autoresizingMask = UIViewAutoresizingFlexibleWidth;
		[sv addSubview:timelineView];
		timelineView.date = date;
		[self.pages addObject:sv];
		info.day += 1;
	}
	self.currentDay = [self _timelineAtIndex:1].date;
    [self _updateDateLabel];
    [self addSubview:self.daysBackgroundView];
    [self addSubview:self.monthYearLabel];
	NSInteger cnt = 0;    
    NSDateFormatter *dateFormat = [[NSDateFormatter alloc] init];    
    dateFormat.dateFormat = @"eee";    
    dateFormat.timeZone = self.timeZone;    
    NSDateComponents *sund = [[NSDateComponents alloc] init];    
    sund.day = 5;    
    sund.month = 12;    
    sund.year = 2010;    
    sund.hour = sund.minute = sund.second = sund.weekday = 0;    
    sund.timeZone = self.timeZone;    
    NSString * sun = [dateFormat stringFromDate:[NSDate dateWithDateComponents:sund]];    
    sund.day = 6;
    NSString *mon = [dateFormat stringFromDate:[NSDate dateWithDateComponents:sund]];    
    sund.day = 7;
    NSString *tue = [dateFormat stringFromDate:[NSDate dateWithDateComponents:sund]];    
    sund.day = 8;
    NSString *wed = [dateFormat stringFromDate:[NSDate dateWithDateComponents:sund]];    
    sund.day = 9;
    NSString *thu = [dateFormat stringFromDate:[NSDate dateWithDateComponents:sund]];
    sund.day = 10;
    NSString *fri = [dateFormat stringFromDate:[NSDate dateWithDateComponents:sund]];    
    sund.day = 11;
    NSString *sat = [dateFormat stringFromDate:[NSDate dateWithDateComponents:sund]];    
    NSArray *ar;
    if(self.sunday) ar = @[sun,mon,tue,wed,thu,fri,sat];
    else ar = @[mon,tue,wed,thu,fri,sat,sun];    
	NSInteger per = CGFrameGetWidth(self) - (DAY_LABEL_WIDTH *7);
	per /= 7;
	NSInteger minX = per / 2;	
	for(NSString *str in ar){		
        UILabel *label = [[UILabel alloc] initWithFrame:CGRectMake(minX + cnt*(DAY_LABEL_WIDTH+per) , 0, DAY_LABEL_WIDTH, 20)];        
        if ([str isEqualToString:@"Sun"]) {
            label.accessibilityLabel = @"Sunday";
        }
        else if ([str isEqualToString:@"Mon"]) {
            label.accessibilityLabel = @"Monday";
        }
        else if ([str isEqualToString:@"Tue"]) {
            label.accessibilityLabel = @"Tuesday";
        }
        else if ([str isEqualToString:@"Wed"]) {
            label.accessibilityLabel = @"Wednesday";
        }
        else if ([str isEqualToString:@"Thu"]) {
            label.accessibilityLabel = @"Thursday";
        }
        else if ([str isEqualToString:@"Fri"]) {
            label.accessibilityLabel = @"Friday";
        }
        else if ([str isEqualToString:@"Sat"]) {
            label.accessibilityLabel = @"Saturday";
        }
		label.font = [UIFont systemFontOfSize:10];
        label.text = [str substringToIndex:1];		
        label.textColor = cnt == 0 || cnt == 6 ? WEEKEND_TEXT_COLOR : [UIColor blackColor];		
        label.textAlignment = NSTextAlignmentCenter;		
        label.userInteractionEnabled = NO;		
        [self.daysBackgroundView addSubview:label];		
        [label sizeToFitWithAlignment];
		cnt++;
	}	
	[self.daysBackgroundView addSubviewToBack:self.daysScrollView];	
	UIView *dayContainerView = [[UIView alloc] initWithFrame:CGRectMake(0, 0, self.daysScrollView.contentSize.width, CGRectGetHeight(self.daysScrollView.frame))];    
	[self.daysScrollView addSubview:dayContainerView];	
	CGRect weekFrame = self.daysScrollView.frame;	
    weekFrame.origin = CGPointZero;	
    for(NSInteger i=0;i<3;i++){		
		weekFrame.origin.x = CGRectGetWidth(weekFrame) * i;	
        TKWeekdaysView *weekdayView = [[TKWeekdaysView alloc] initWithFrame:weekFrame];		
		for(UILabel *label in weekdayView.weekdayLabels){		
            label.userInteractionEnabled = YES;			
            [label addGestureRecognizer:[[UITapGestureRecognizer alloc] initWithTarget:self action:@selector(didTapWeekdayLabel:)]];
		}		
        [dayContainerView addSubviewToBack:weekdayView];
        [self.weekdayPages addObject:weekdayView];
	}
}

This is to fix the dates :
- (void) _setupDaysView{
	NSArray *labels =  [self _allDayLabels];
    NSDateComponents *comp = [self.calendar components:NSCalendarUnitDay | NSCalendarUnitMonth | NSCalendarUnitYear | NSCalendarUnitEra | NSCalendarUnitWeekday fromDate:self.currentDay];
    NSDateComponents *mutedCom = [self.calendar components:NSCalendarUnitDay | NSCalendarUnitMonth | NSCalendarUnitYear | NSCalendarUnitEra fromDate:self.currentDay];
    for(NSInteger cnt= comp.weekday + 5;cnt>=0;cnt--){
        NSDate *aDate = [self.calendar dateFromComponents:mutedCom];
        mutedCom = [self.calendar components:NSCalendarUnitDay | NSCalendarUnitMonth | NSCalendarUnitYear | NSCalendarUnitEra fromDate:aDate];
        TKDateLabel *label = labels[cnt];
        label.text = [NSString stringWithFormat:@"%@",@(mutedCom.day)];
        label.date = aDate;
        label.today = [aDate isTodayWithTimeZone:self.calendar.timeZone];
        label.selected = [aDate isSameDay:self.currentDay timeZone:self.calendar.timeZone];
        mutedCom.day --;
	}
	mutedCom = [self.calendar components:NSCalendarUnitDay | NSCalendarUnitMonth | NSCalendarUnitYear | NSCalendarUnitEra fromDate:self.currentDay];
	for(NSInteger cnt= comp.weekday + 5;cnt<labels.count;cnt++){
		NSDate *aDate = [self.calendar dateFromComponents:mutedCom];
        mutedCom = [self.calendar components:NSCalendarUnitDay | NSCalendarUnitMonth | NSCalendarUnitYear | NSCalendarUnitEra fromDate:aDate];
        TKDateLabel *label = labels[cnt];
        label.text = [NSString stringWithFormat:@"%@",@(mutedCom.day)];
        label.date = aDate;
        label.today = [aDate isTodayWithTimeZone:self.calendar.timeZone];
        label.selected = [aDate isSameDay:self.currentDay timeZone:self.calendar.timeZone];
        mutedCom.day ++;
	}
	self.indexOfCurrentDay = comp.weekday-1;
}