diff --git a/ALCalendarPicker/ALCalendarCell.h b/ALCalendarPicker/ALCalendarCell.h
new file mode 100644
index 0000000..353f9f6
--- /dev/null
+++ b/ALCalendarPicker/ALCalendarCell.h
@@ -0,0 +1,22 @@
+//
+//  ALCalendarCell.h
+//  ALCalendarPickerDemo
+//
+//  Created by Arclin on 2017/6/16.
+//  Copyright © 2017年 arclin. All rights reserved.
+//
+
+#import <UIKit/UIKit.h>
+
+@class ALCalendarDate;
+
+@interface ALCalendarCell : UICollectionViewCell
+
+@property (nonatomic, strong) ALCalendarDate *date;
+
+/** 星期 */
+@property (nonatomic, copy) NSString *weekDay;
+
+@property (nonatomic, strong, readonly) UILabel *dateLabel;
+
+@end
diff --git a/ALCalendarPicker/ALCalendarCell.m b/ALCalendarPicker/ALCalendarCell.m
new file mode 100644
index 0000000..b7a18c2
--- /dev/null
+++ b/ALCalendarPicker/ALCalendarCell.m
@@ -0,0 +1,79 @@
+//
+//  ALCalendarCell.m
+//  ALCalendarPickerDemo
+//
+//  Created by Arclin on 2017/6/16.
+//  Copyright © 2017年 arclin. All rights reserved.
+//
+
+#import "ALCalendarCell.h"
+
+#import "ALCalendarDate.h"
+
+#import <Masonry/Masonry.h>
+
+#define KLightGrayColor [UIColor colorWithRed:127.0/255.0 green:143.0/255.0 blue:164.0/255.0 alpha:1]
+
+#define KDarkGrayColor  [UIColor colorWithRed:44.0/255.0 green:49.0/255.0 blue:53.0/255.0 alpha:1]
+
+@interface ALCalendarCell()
+
+@property (nonatomic, strong) UILabel *dateLabel;
+
+@end
+
+@implementation ALCalendarCell
+
+- (instancetype)initWithFrame:(CGRect)frame
+{
+    if(self = [super initWithFrame:frame]) {
+        [self setupView];
+    }
+    return self;
+}
+
+- (void)setupView
+{
+    [self addSubview:self.dateLabel];
+    
+    self.layer.cornerRadius = 5.0f;
+    
+    __weak typeof(self) weakSelf = self;
+    [self.dateLabel mas_makeConstraints:^(MASConstraintMaker *make) {
+        make.centerX.equalTo(weakSelf.mas_centerX);
+        make.centerY.equalTo(weakSelf.mas_centerY);
+    }];
+}
+
+- (void)setDate:(ALCalendarDate *)date
+{
+    _date = date;
+    if (date.notThisMonth) {
+        self.backgroundColor = [UIColor whiteColor];
+        self.dateLabel.textColor = KLightGrayColor;
+    } else {
+        self.backgroundColor = [UIColor whiteColor];
+        self.dateLabel.textColor = KDarkGrayColor;
+    }
+    self.dateLabel.text = date.date;
+}
+
+- (void)setWeekDay:(NSString *)weekDay
+{
+    _weekDay = weekDay;
+    self.dateLabel.text = weekDay;
+    self.dateLabel.textColor = KLightGrayColor;
+}
+
+- (UILabel *)dateLabel
+{
+    if (!_dateLabel) {
+        _dateLabel = [[UILabel alloc] init];
+        _dateLabel.textColor = KDarkGrayColor;
+        _dateLabel.font = [UIFont systemFontOfSize:14];
+    }
+    return _dateLabel;
+}
+
+
+@end
diff --git a/ALCalendarPicker/ALCalendarCollectionView.h b/ALCalendarPicker/ALCalendarCollectionView.h
new file mode 100644
index 0000000..69b3b76
--- /dev/null
+++ b/ALCalendarPicker/ALCalendarCollectionView.h
@@ -0,0 +1,33 @@
+//
+//  ALCalendarCollectionView.h
+//  ALCalendarPickerDemo
+//
+//  Created by Arclin on 2017/6/16.
+//  Copyright © 2017年 arclin. All rights reserved.
+//
+
+#import <UIKit/UIKit.h>
+
+@class ALCalendarDate,ALCalendarCollectionView,ALCalendarConfig;
+
+@protocol ALCalendarCollectionViewDelegate <NSObject>
+
+/** 
+ * 点击了某个日期
+ */
+- (void)calendarView:(ALCalendarCollectionView *)calendarCollectionView didSelectItem:(ALCalendarDate *)date dateString:(NSString *)dateString;
+
+@end
+
+@interface ALCalendarCollectionView : UICollectionView
+
+/** 当前的年份和月份 yyyy-MM */
+@property (nonatomic, copy) NSString *yearAndMonth;
+
+/** 代理 */
+@property (nonatomic, assign) id<ALCalendarCollectionViewDelegate> collectionViewDelegate;
+
+/** 配置 */
+@property (nonatomic, strong) ALCalendarConfig *config;
+
+@end
diff --git a/ALCalendarPicker/ALCalendarCollectionView.m b/ALCalendarPicker/ALCalendarCollectionView.m
new file mode 100644
index 0000000..9c1b8e0
--- /dev/null
+++ b/ALCalendarPicker/ALCalendarCollectionView.m
@@ -0,0 +1,133 @@
+//
+//  ALCalendarCollectionView.m
+//  ALCalendarPickerDemo
+//
+//  Created by Arclin on 2017/6/16.
+//  Copyright © 2017年 arclin. All rights reserved.
+//
+
+#import "ALCalendarCollectionView.h"
+
+#import "ALCalendarCell.h"
+
+#import "ALCalendarDate.h"
+#import "ALCalendarHelper.h"
+#import "ALCalendarConfig.h"
+
+#import "UIView+Frame.h"
+
+@interface ALCalendarCollectionView()<UICollectionViewDelegate,UICollectionViewDataSource,UICollectionViewDelegateFlowLayout>
+
+@property (nonatomic, strong) NSArray *titles;
+
+@property (nonatomic, strong) NSArray *dates;
+
+@end
+
+@implementation ALCalendarCollectionView
+
+static NSString *identifier = @"dateCell";
+
+- (instancetype)initWithFrame:(CGRect)frame collectionViewLayout:(nonnull UICollectionViewLayout *)layout
+{
+    if (self = [super initWithFrame:frame collectionViewLayout:layout]) {
+        self.dataSource      = self;
+        self.delegate        = self;
+        self.contentInset    = UIEdgeInsetsMake(5, 20, 0, 20);
+        self.backgroundColor = [UIColor whiteColor];
+        [self registerClass:[ALCalendarCell class] forCellWithReuseIdentifier:identifier];
+    }
+    return self;
+}
+
+#pragma mark - UICollectionDataSource
+- (NSInteger)numberOfSectionsInCollectionView:(UICollectionView *)collectionView
+{
+    return 2;
+}
+
+- (NSInteger)collectionView:(UICollectionView *)collectionView numberOfItemsInSection:(NSInteger)section
+{
+    if (section == 0) return 7;
+    return self.dates.count;
+}
+
+- (UICollectionViewCell *)collectionView:(UICollectionView *)collectionView cellForItemAtIndexPath:(NSIndexPath *)indexPath
+{
+    ALCalendarCell *cell = [collectionView dequeueReusableCellWithReuseIdentifier:identifier forIndexPath:indexPath];
+    cell.backgroundColor = [UIColor whiteColor];
+    
+    if(indexPath.section == 0) {
+        cell.weekDay = self.titles[indexPath.row];
+    } else {
+        ALCalendarDate *date = self.dates[indexPath.row];
+        cell.date = date;
+        
+        /** 当前显示的日期 */
+        NSString *currentDate = [self.yearAndMonth stringByAppendingFormat:@"-%02zd",date.date.integerValue];
+        
+        if ([self.config.heightlightDates containsObject:currentDate]) {
+            cell.backgroundColor = self.config.hl_backgroundColor;
+            cell.layer.cornerRadius = self.config.hl_backgroundCornerRadius.floatValue;
+            cell.dateLabel.textColor = self.config.hl_textColor;
+        }
+        
+        if (date.isToday) {
+            if (![self.config.heightlightDates containsObject:currentDate] ||
+                ([self.config.heightlightDates containsObject:currentDate] && !self.config.hightlightPriority)) {
+                cell.backgroundColor     = self.config.tod_backgroundColor;
+                cell.layer.cornerRadius  = self.config.tod_backgroundCornerRadius.floatValue;
+                cell.dateLabel.textColor = self.config.tod_textColor;
+            }
+        }
+    }
+    return cell;
+}
+
+#pragma mark - UICollectionDelegate
+
+- (void)collectionView:(UICollectionView *)collectionView didSelectItemAtIndexPath:(NSIndexPath *)indexPath
+{
+    if ([self.collectionViewDelegate respondsToSelector:@selector(calendarView:didSelectItem:dateString:)]) {
+        ALCalendarDate *date = self.dates[indexPath.row];
+        [self.collectionViewDelegate calendarView:self didSelectItem:date dateString:[self.yearAndMonth stringByAppendingFormat:@"-%02zd",date.date.integerValue]];
+    }
+}
+
+- (CGSize)collectionView:(UICollectionView *)collectionView layout:(UICollectionViewLayout *)collectionViewLayout sizeForItemAtIndexPath:(NSIndexPath *)indexPath
+{
+    return CGSizeMake(self.width / 10, self.width / 10);
+}
+
+- (CGFloat)collectionView:(UICollectionView *)collectionView layout:(UICollectionViewLayout *)collectionViewLayout minimumLineSpacingForSectionAtIndex:(NSInteger)section
+{
+    return 10;
+}
+
+- (CGFloat)collectionView:(UICollectionView *)collectionView layout:(UICollectionViewLayout *)collectionViewLayout minimumInteritemSpacingForSectionAtIndex:(NSInteger)section
+{
+    return 10;
+}
+
+- (UIEdgeInsets)collectionView:(UICollectionView *)collectionView layout:(UICollectionViewLayout *)collectionViewLayout insetForSectionAtIndex:(NSInteger)section
+{
+    return UIEdgeInsetsMake(5, 0, 5, 0);
+}
+
+#pragma mark - setter & getter
+
+- (NSArray *)titles
+{
+    return @[@"日",@"一",@"二",@"三",@"四",@"五",@"六"];
+}
+
+- (void)setYearAndMonth:(NSString *)yearAndMonth
+{
+    _yearAndMonth = yearAndMonth;
+    if (yearAndMonth) {
+        _dates = [ALCalendarHelper datesWithYearAndMonth:yearAndMonth];
+        [self reloadData];
+    }
+}
+
+@end
diff --git a/ALCalendarPicker/ALCalendarConfig.h b/ALCalendarPicker/ALCalendarConfig.h
new file mode 100644
index 0000000..5aa3e3e
--- /dev/null
+++ b/ALCalendarPicker/ALCalendarConfig.h
@@ -0,0 +1,41 @@
+//
+//  ALCalendarConfig.h
+//  ALCalendarPickerDemo
+//
+//  Created by Arclin on 2017/6/17.
+//  Copyright © 2017年 arclin. All rights reserved.
+//
+
+#import <UIKit/UIKit.h>
+
+@interface ALCalendarConfig : NSObject
+
+/** 当前日期优先 */
+@property (nonatomic, assign) BOOL hightlightPriority;
+
+/**** 今天日期 *****/
+
+/** 文字颜色 */
+@property (nonatomic, strong) UIColor *tod_textColor;
+
+/** 背景颜色 */
+@property (nonatomic, strong) UIColor *tod_backgroundColor;
+
+/** 圆角 */
+@property (nonatomic, strong) NSNumber *tod_backgroundCornerRadius;
+
+/**** 高亮日期 ****/
+
+/** 高亮日期 */
+@property (nonatomic, strong) NSArray<NSString *> *heightlightDates;
+
+/** 文字颜色 */
+@property (nonatomic, strong) UIColor *hl_textColor;
+
+/** 背景颜色 */
+@property (nonatomic, strong) UIColor *hl_backgroundColor;
+
+/** 圆角 */
+@property (nonatomic, strong) NSNumber *hl_backgroundCornerRadius;
+
+@end
diff --git a/ALCalendarPicker/ALCalendarConfig.m b/ALCalendarPicker/ALCalendarConfig.m
new file mode 100644
index 0000000..69d77fd
--- /dev/null
+++ b/ALCalendarPicker/ALCalendarConfig.m
@@ -0,0 +1,13 @@
+//
+//  ALCalendarConfig.m
+//  ALCalendarPickerDemo
+//
+//  Created by Arclin on 2017/6/17.
+//  Copyright © 2017年 arclin. All rights reserved.
+//
+
+#import "ALCalendarConfig.h"
+
+@implementation ALCalendarConfig
+
+@end
diff --git a/ALCalendarPicker/ALCalendarDate.h b/ALCalendarPicker/ALCalendarDate.h
new file mode 100644
index 0000000..f0de5d1
--- /dev/null
+++ b/ALCalendarPicker/ALCalendarDate.h
@@ -0,0 +1,24 @@
+//
+//  ALCalendarDate.h
+//  ALCalendarPickerDemo
+//
+//  Created by Arclin on 2017/6/17.
+//  Copyright © 2017年 arclin. All rights reserved.
+//
+
+#import <Foundation/Foundation.h>
+
+@interface ALCalendarDate : NSObject
+
+/** 日期(号数) */
+@property (nonatomic, copy) NSString *date;
+
+/** 不是这个月 */
+@property (nonatomic, assign) BOOL notThisMonth;
+
+/** 是今天 */
+@property (nonatomic, assign) BOOL isToday;
+
++ (instancetype)dateWith:(NSString *)dateStr isNotThisMonth:(BOOL)notThisMonth;
+
+@end
diff --git a/ALCalendarPicker/ALCalendarDate.m b/ALCalendarPicker/ALCalendarDate.m
new file mode 100644
index 0000000..13200e5
--- /dev/null
+++ b/ALCalendarPicker/ALCalendarDate.m
@@ -0,0 +1,21 @@
+//
+//  ALCalendarDate.m
+//  ALCalendarPickerDemo
+//
+//  Created by Arclin on 2017/6/17.
+//  Copyright © 2017年 arclin. All rights reserved.
+//
+
+#import "ALCalendarDate.h"
+
+@implementation ALCalendarDate
+
++ (instancetype)dateWith:(NSString *)dateStr isNotThisMonth:(BOOL)notThisMonth
+{
+    ALCalendarDate *date = [[ALCalendarDate alloc] init];
+    date.date            = dateStr;
+    date.notThisMonth    = notThisMonth;
+    return date;
+}
+
+@end
diff --git a/ALCalendarPicker/ALCalendarHeader.h b/ALCalendarPicker/ALCalendarHeader.h
new file mode 100644
index 0000000..516d727
--- /dev/null
+++ b/ALCalendarPicker/ALCalendarHeader.h
@@ -0,0 +1,38 @@
+//
+//  ALCalendarHeader.h
+//  ALCalendarPickerDemo
+//
+//  Created by Arclin on 2017/6/16.
+//  Copyright © 2017年 arclin. All rights reserved.
+//
+
+#import <UIKit/UIKit.h>
+
+@class ALCalendarHeader;
+
+@protocol ALCalendarHeaderDelegate <NSObject>
+
+/**
+ 点击了左边的按钮
+ */
+- (void)header:(ALCalendarHeader *)header didClickLeftBtn:(UIButton *)button;
+
+/**
+ 点击了右边的按钮
+ */
+- (void)header:(ALCalendarHeader *)header didClickRightBtn:(UIButton *)button;
+
+@end
+
+@interface ALCalendarHeader : UIView
+
+@property (nonatomic, copy) NSString *title;
+
+/** 起始年月 yyyy-MM */
+@property (nonatomic, copy) NSString *beginYearMonth;
+
+/** 代理 */
+@property (nonatomic, assign) id<ALCalendarHeaderDelegate> delegate;
+
+
+@end
diff --git a/ALCalendarPicker/ALCalendarHeader.m b/ALCalendarPicker/ALCalendarHeader.m
new file mode 100644
index 0000000..1a8f058
--- /dev/null
+++ b/ALCalendarPicker/ALCalendarHeader.m
@@ -0,0 +1,136 @@
+//
+//  ALCalendarHeader.m
+//  ALCalendarPickerDemo
+//
+//  Created by Arclin on 2017/6/16.
+//  Copyright © 2017年 arclin. All rights reserved.
+//
+
+#import "ALCalendarHeader.h"
+
+#import "ALCalendarHelper.h"
+
+#import "UIView+Frame.h"
+
+#import <Masonry/Masonry.h>
+
+@interface ALCalendarHeader()
+
+@property (nonatomic, strong) UIButton *leftBtn;
+
+@property (nonatomic, strong) UIButton *rightBtn;
+
+@property (nonatomic, strong) UILabel  *titleLabel;
+
+@end
+
+@implementation ALCalendarHeader
+
+- (instancetype)initWithFrame:(CGRect)frame
+{
+    if (self = [super initWithFrame:frame]) {
+        [self setupView];
+    }
+    return self;
+}
+
+- (void)setupView
+{
+    [self addSubview: self.leftBtn];
+    [self addSubview: self.titleLabel];
+    [self addSubview: self.rightBtn];
+    
+    __weak typeof(self) weakSelf = self;
+    
+    [self.leftBtn mas_makeConstraints:^(MASConstraintMaker *make) {
+        __strong typeof(weakSelf) strongSelf = weakSelf;
+        make.left.equalTo(@15);
+        make.centerY.equalTo(strongSelf.mas_centerY);
+        make.height.equalTo(@15);
+        make.width.equalTo(@15);
+    }];
+    
+    [self.titleLabel mas_makeConstraints:^(MASConstraintMaker *make) {
+        __strong typeof(weakSelf) strongSelf = weakSelf;
+        make.centerX.equalTo(strongSelf.mas_centerX);
+        make.centerY.equalTo(strongSelf.mas_centerY);
+    }];
+    
+    [self.rightBtn mas_makeConstraints:^(MASConstraintMaker *make) {
+        make.trailing.equalTo(@-15);
+        make.centerY.equalTo(weakSelf.mas_centerY);
+        make.height.equalTo(@15);
+        make.width.equalTo(@15);
+    }];
+}
+
+- (void)leftBtnDidClicked:(UIButton *)button
+{
+    if ([self.delegate respondsToSelector:@selector(header:didClickLeftBtn:)]) {
+        [self.delegate header:self didClickLeftBtn:button];
+    }
+}
+
+- (void)rightBtnDidClicked:(UIButton *)button
+{
+    if ([self.delegate respondsToSelector:@selector(header:didClickRightBtn:)]) {
+        [self.delegate header:self didClickRightBtn:button];
+    }
+}
+
+
+- (UIImage *)imagesNamedFromCustomBundle:(NSString *)imgName
+{
+    NSString *bundlePath = [[NSBundle mainBundle].resourcePath stringByAppendingPathComponent:@"ALCalendarPicker.bundle"];
+    NSBundle *bundle = [NSBundle bundleWithPath:bundlePath];
+    NSString *img_path = [bundle pathForResource:imgName ofType:@"png"];
+    return [UIImage imageWithContentsOfFile:img_path];
+}
+
+#pragma mark - setter & getter
+
+- (UIButton *)leftBtn
+{
+    if (!_leftBtn) {
+        _leftBtn = [UIButton buttonWithType:UIButtonTypeCustom];
+        [_leftBtn setImage: [self imagesNamedFromCustomBundle:@"ic_lastday"] forState:UIControlStateNormal];
+        [_leftBtn addTarget:self action:@selector(leftBtnDidClicked:) forControlEvents:UIControlEventTouchUpInside];
+    }
+    return _leftBtn;
+}
+
+- (UIButton *)rightBtn
+{
+    if (!_rightBtn) {
+        _rightBtn = [UIButton buttonWithType:UIButtonTypeCustom];
+        [_rightBtn setImage: [self imagesNamedFromCustomBundle:@"ic_nextday"] forState:UIControlStateNormal];
+        [_rightBtn addTarget:self action:@selector(rightBtnDidClicked:) forControlEvents:UIControlEventTouchUpInside];
+    }
+    return _rightBtn;
+}
+
+- (UILabel *)titleLabel
+{
+    if (!_titleLabel) {
+        _titleLabel = [[UILabel alloc] init];
+        _titleLabel.font = [UIFont systemFontOfSize:16];
+        _titleLabel.textColor = [UIColor darkGrayColor];
+    }
+    return _titleLabel;
+}
+
+- (void)setTitle:(NSString *)title
+{
+    _title = title;
+    // 格式化显示日期
+    NSArray *dates = [title componentsSeparatedByString:@"-"];
+    self.titleLabel.text = [NSString stringWithFormat:@"%@年 - %@月",dates.firstObject,dates.lastObject];
+    
+    if([title isEqualToString:self.beginYearMonth]) {
+        self.leftBtn.enabled = NO;
+    } else {
+        self.leftBtn.enabled = YES;
+    }
+}
+
+@end
diff --git a/ALCalendarPicker/ALCalendarHelper.h b/ALCalendarPicker/ALCalendarHelper.h
new file mode 100644
index 0000000..3af7ddf
--- /dev/null
+++ b/ALCalendarPicker/ALCalendarHelper.h
@@ -0,0 +1,28 @@
+//
+//  ALCalendarHelper.h
+//  ALCalendarPickerDemo
+//
+//  Created by Arclin on 2017/6/16.
+//  Copyright © 2017年 arclin. All rights reserved.
+//
+
+#import <Foundation/Foundation.h>
+
+@interface ALCalendarHelper : NSObject
+
+/** 根据当前年月得出日历数组 */
++ (NSArray *)datesWithYearAndMonth:(NSString *)ym;
+
+/** 当前的年份和月份 yyyy-MM */
++ (NSString *)currentYearAndMonth;
+
+/** 今天 yyyy-MM-dd */
++ (NSString *)today;
+
+/** 指定某个年月yyyy-MM 得到下个年月yyyy-MM */
++ (NSString *)nextYearAndMonth:(NSString *)thisYearAndMonth;
+
+/** 指定某个年月yyyy-MM 得到上个年月yyyy-MM */
++ (NSString *)lastYearAndMonth:(NSString *)thisYearAndMonth;
+
+@end
diff --git a/ALCalendarPicker/ALCalendarHelper.m b/ALCalendarPicker/ALCalendarHelper.m
new file mode 100644
index 0000000..926da68
--- /dev/null
+++ b/ALCalendarPicker/ALCalendarHelper.m
@@ -0,0 +1,142 @@
+//
+//  ALCalendarHelper.m
+//  ALCalendarPickerDemo
+//
+//  Created by Arclin on 2017/6/16.
+//  Copyright © 2017年 arclin. All rights reserved.
+//
+
+#import "ALCalendarHelper.h"
+#import "ALCalendarDate.h"
+
+@implementation ALCalendarHelper
+
++ (NSArray *)datesWithYearAndMonth:(NSString *)ym
+{
+    NSCalendar *calendar = [[NSCalendar alloc] initWithCalendarIdentifier:NSCalendarIdentifierGregorian];
+    NSInteger unitFlags = NSCalendarUnitYear | NSCalendarUnitMonth | NSCalendarUnitDay | NSCalendarUnitWeekday | NSCalendarUnitHour | NSCalendarUnitMinute | NSCalendarUnitSecond;
+    
+    // 设定一号
+    NSString *dateStr = [ym stringByAppendingString:@"-01"];
+    
+    // 转成NSDate
+    NSDateFormatter *formatter = [[NSDateFormatter alloc] init];
+    formatter.timeZone = [NSTimeZone timeZoneForSecondsFromGMT:0];
+    formatter.dateFormat = @"yyyy-MM-dd";
+    
+    NSDate *date = [self dateStringToDate:dateStr format:@"yyyy-MM-dd"];
+    
+    // 转成日历组件
+    NSDateComponents *comps;
+    comps = [calendar components:unitFlags fromDate:date];
+    
+    // 当前月一号是星期几（注意，周日是“1”，周一是“2”。。。。）
+    NSInteger weekday = comps.weekday;
+    // 当前月的天数
+    NSInteger days = [calendar rangeOfUnit:NSCalendarUnitDay inUnit:NSCalendarUnitMonth forDate:date].length;
+    // 当前月最后一天
+    NSString *thisMonthLastDateStr = [NSString stringWithFormat:@"%@-%zd",ym,days];
+    NSDate   *thisMonthLastDate    = [formatter dateFromString:thisMonthLastDateStr];
+    // 当前月最后一天是星期几
+    comps = [calendar components:unitFlags fromDate:thisMonthLastDate];
+    NSInteger lastDaysWeekDay = comps.weekday;
+    
+    // 上个月的天数
+    [comps setDay:1];
+    [comps setMonth:comps.month - 1];
+    NSDate *lastMonth = [calendar dateFromComponents:comps];
+    NSInteger lastMonthDays = [calendar rangeOfUnit:NSCalendarUnitDay inUnit:NSCalendarUnitMonth forDate:lastMonth].length;
+    
+    NSMutableArray *lastMonthDates = [NSMutableArray array];
+    for (NSInteger i = 0; i < weekday - 1; i++) {
+        NSString *d = [NSString stringWithFormat:@"%zd",lastMonthDays - i];
+        ALCalendarDate *dat = [ALCalendarDate dateWith:d isNotThisMonth:YES];
+        [lastMonthDates addObject:dat];
+    }
+    lastMonthDates = [lastMonthDates reverseObjectEnumerator].allObjects.mutableCopy;
+    
+    NSMutableArray *thisMonthDates = [NSMutableArray array];
+    for (NSInteger i = 1 ; i <= days ; i++) {
+        NSString *d = [NSString stringWithFormat:@"%zd",i];
+        ALCalendarDate *dat = [ALCalendarDate dateWith:d isNotThisMonth:NO];
+        if ([[ym stringByAppendingFormat:@"-%@",d] isEqualToString:[self today]]) { // 判断今天
+            dat.isToday = YES;
+        }
+        [thisMonthDates addObject:dat];
+    }
+    
+    NSMutableArray *nextMonthDates = [NSMutableArray array];
+    for (NSInteger i = 1 ; i <= 7 - lastDaysWeekDay; i++) {
+        NSString *d = [NSString stringWithFormat:@"%zd",i];
+        ALCalendarDate *dat = [ALCalendarDate dateWith:d isNotThisMonth:YES];
+        [nextMonthDates addObject:dat];
+    }
+    
+    NSMutableArray *arr = [NSMutableArray arrayWithArray:lastMonthDates];
+    [arr addObjectsFromArray:thisMonthDates];
+    [arr addObjectsFromArray:nextMonthDates];
+    
+    return arr;
+}
+
++ (NSString *)currentYearAndMonth
+{
+    NSDate *now = [NSDate date];
+    
+    // 转成NSDate
+    NSString *dateStr = [self dateToDateString:now format:@"yyyy-MM"];
+    
+    return dateStr;
+}
+
++ (NSString *)today
+{
+    NSString *todayDate = [self dateToDateString:[NSDate date] format:@"yyyy-MM-dd"];
+    return todayDate;
+}
+
++ (NSString *)nextYearAndMonth:(NSString *)thisYearAndMonth
+{
+    NSDate *date = [self dateStringToDate:thisYearAndMonth format:@"yyyy-MM"];
+    NSCalendar *calendar = [[NSCalendar alloc] initWithCalendarIdentifier:NSCalendarIdentifierGregorian];
+    NSInteger unitFlags = NSCalendarUnitYear | NSCalendarUnitMonth;
+    NSDateComponents *comps = [calendar components:unitFlags fromDate:date];
+    comps.timeZone = [NSTimeZone timeZoneForSecondsFromGMT:0];
+    [comps setMonth: comps.month + 1];
+    NSDate *nextMonth = [calendar dateFromComponents:comps];
+    return [self dateToDateString:nextMonth format:@"yyyy-MM"];
+}
+
++ (NSString *)lastYearAndMonth:(NSString *)thisYearAndMonth
+{
+    NSDate *date = [self dateStringToDate:thisYearAndMonth format:@"yyyy-MM"];
+    NSCalendar *calendar = [[NSCalendar alloc] initWithCalendarIdentifier:NSCalendarIdentifierGregorian];
+    NSInteger unitFlags = NSCalendarUnitYear | NSCalendarUnitMonth;
+    NSDateComponents *comps = [calendar components:unitFlags fromDate:date];
+    comps.timeZone = [NSTimeZone timeZoneForSecondsFromGMT:0];
+    [comps setMonth: comps.month - 1];
+    NSDate *lastMonth = [calendar dateFromComponents:comps];
+    return [self dateToDateString:lastMonth format:@"yyyy-MM"];
+}
+
++ (NSString *)dateToDateString:(NSDate *)date format:(NSString *)format
+{
+    // 转成NSDate
+    NSDateFormatter *formatter = [[NSDateFormatter alloc] init];
+    formatter.timeZone = [NSTimeZone timeZoneForSecondsFromGMT:0];
+    formatter.dateFormat = format;
+    NSString *dateStr = [formatter stringFromDate:date];
+    return dateStr;
+}
+
++ (NSDate *)dateStringToDate:(NSString *)dateString format:(NSString *)format
+{
+    // 转成NSDate
+    NSDateFormatter *formatter = [[NSDateFormatter alloc] init];
+    formatter.timeZone = [NSTimeZone timeZoneForSecondsFromGMT:0];
+    formatter.dateFormat = format;
+    NSDate *date = [formatter dateFromString:dateString];
+    return date;
+}
+
+@end
diff --git a/ALCalendarPicker/ALCalendarPicker.bundle/ic_lastday.png b/ALCalendarPicker/ALCalendarPicker.bundle/ic_lastday.png
new file mode 100644
index 0000000..9d0286f
Binary files /dev/null and b/ALCalendarPicker/ALCalendarPicker.bundle/ic_lastday.png differ
diff --git a/ALCalendarPicker/ALCalendarPicker.bundle/ic_nextday.png b/ALCalendarPicker/ALCalendarPicker.bundle/ic_nextday.png
new file mode 100644
index 0000000..a42a334
Binary files /dev/null and b/ALCalendarPicker/ALCalendarPicker.bundle/ic_nextday.png differ
diff --git a/ALCalendarPicker/ALCalendarPicker.h b/ALCalendarPicker/ALCalendarPicker.h
new file mode 100644
index 0000000..86091d7
--- /dev/null
+++ b/ALCalendarPicker/ALCalendarPicker.h
@@ -0,0 +1,41 @@
+//
+//  ALCalendarPicker.h
+//  ALCalendarPickerDemo
+//
+//  Created by Arclin on 2017/6/16.
+//  Copyright © 2017年 arclin. All rights reserved.
+//
+
+#import <UIKit/UIKit.h>
+
+@class ALCalendarPicker,ALCalendarDate;
+
+@protocol ALCalendarPickerDelegate <NSObject>
+
+/**
+ 选择某个日期
+ */
+- (void)calendarPicker:(ALCalendarPicker *)picker didSelectItem:(ALCalendarDate *)date dateString:(NSString *)dateStr;
+
+@end
+
+@interface ALCalendarPicker : UIView
+
+/** 起始年月 yyyy-MM */
+@property (nonatomic, copy) NSString *beginYearMonth;
+
+@property (nonatomic, assign) id<ALCalendarPickerDelegate> delegate;
+
+/** 高亮日期 yyyy-MM-dd 格式 */
+@property (nonatomic, assign) NSArray<NSString *> *hightLightItems;
+
+/** 高亮日期优先 当高亮日期与当日日期的重叠的时候优先使用高亮日期的样式 */
+@property (nonatomic, assign) BOOL hightlightPriority;
+
+/** 高亮的日期的样式 */
+- (void)setupHightLightItemStyle:(void(^)(UIColor **backgroundColor,NSNumber **backgroundCornerRadius,UIColor **titleColor))style;
+
+/** 当日日期的样式 */
+- (void)setupTodayItemStyle:(void(^)(UIColor **backgroundColor,NSNumber **backgroundCornerRadius,UIColor **titleColor))style;
+
+@end
diff --git a/ALCalendarPicker/ALCalendarPicker.m b/ALCalendarPicker/ALCalendarPicker.m
new file mode 100644
index 0000000..3aa2ea4
--- /dev/null
+++ b/ALCalendarPicker/ALCalendarPicker.m
@@ -0,0 +1,267 @@
+//
+//  ALCalendarPicker.m
+//  ALCalendarPickerDemo
+//
+//  Created by Arclin on 2017/6/16.
+//  Copyright © 2017年 arclin. All rights reserved.
+//
+
+#import "ALCalendarPicker.h"
+
+#import "ALCalendarHeader.h"
+#import "ALCalendarCollectionView.h"
+
+#import "ALCalendarHelper.h"
+#import "ALCalendarConfig.h"
+
+#import "UIView+Frame.h"
+
+#import <Masonry/Masonry.h>
+
+@interface ALCalendarPicker()<UIScrollViewDelegate,ALCalendarHeaderDelegate,ALCalendarCollectionViewDelegate>
+{
+    NSInteger _currentPage;
+}
+@property (nonatomic, strong) ALCalendarHeader         * header;
+
+@property (nonatomic, strong) UIScrollView             * scrollView;
+
+@property (nonatomic, strong) NSMutableArray<ALCalendarCollectionView *> *collectionViews;
+
+/** 配置 */
+@property (nonatomic, strong) ALCalendarConfig *config;
+
+@end
+
+@implementation ALCalendarPicker
+
+static CGFloat headerHeight = 45;
+
+- (instancetype)initWithFrame:(CGRect)frame
+{
+    if(self = [super initWithFrame:frame])
+    {
+        [self setupView];
+    }
+    return self;
+}
+
+- (void)setupView
+{
+    [self addSubview: self.header];
+    [self addSubview: self.scrollView];
+    
+    __weak typeof(self) weakSelf = self;
+    
+    // 头部信息栏
+    [self.header mas_makeConstraints:^(MASConstraintMaker *make) {
+        make.left.equalTo(@0);
+        make.top.equalTo(@0);
+        make.width.equalTo(weakSelf.mas_width);
+        make.height.equalTo(@(headerHeight));
+    }];
+    
+    // 内容
+    [self.scrollView mas_makeConstraints:^(MASConstraintMaker *make) {
+        __strong typeof(weakSelf) strongSelf = weakSelf;
+        make.left.equalTo(@0);
+        make.top.equalTo(strongSelf.header.mas_bottom);
+        make.bottom.equalTo(@0);
+        make.right.equalTo(@0);
+    }];
+}
+
+- (void)setupTodayItemStyle:(void(^)(UIColor **backgroundColor,NSNumber **backgroundCornerRadius,UIColor **titleColor))style
+{
+    UIColor *backgroundColor;
+    UIColor *titleColor;
+    NSNumber *backgroundCornerRadius;
+    if (style) {
+        style(&backgroundColor,&backgroundCornerRadius,&titleColor);
+    }
+    // 配置今日日期样式
+    self.config.tod_backgroundColor = backgroundColor;
+    self.config.tod_textColor = titleColor;
+    self.config.tod_backgroundCornerRadius = backgroundCornerRadius;
+    
+    for (ALCalendarCollectionView *collectionView in self.collectionViews) {
+        collectionView.config = self.config;
+        [collectionView reloadData];
+    }
+}
+
+- (void)setupHightLightItemStyle:(void(^)(UIColor **backgroundColor,NSNumber **backgroundCornerRadius,UIColor **titleColor))style
+{
+    UIColor *backgroundColor;
+    UIColor *titleColor;
+    NSNumber *backgroundCornerRadius;
+    if (style) {
+        style(&backgroundColor,&backgroundCornerRadius,&titleColor);
+    }
+    // 配置高亮样式
+    self.config.hl_backgroundColor = backgroundColor;
+    self.config.hl_textColor = titleColor;
+    self.config.hl_backgroundCornerRadius = backgroundCornerRadius;
+    
+    for (ALCalendarCollectionView *collectionView in self.collectionViews) {
+        collectionView.config = self.config;
+        [collectionView reloadData];
+    }
+}
+
+#pragma mark - Private Method
+
+- (void)showLeftCalendar
+{
+    self.header.title = [ALCalendarHelper lastYearAndMonth:self.header.title];
+    [self refreshCollectionView:NO];
+}
+
+- (void)showRightCalendar
+{
+    self.header.title = [ALCalendarHelper nextYearAndMonth:self.header.title];
+    [self refreshCollectionView:YES];
+}
+
+- (void)setupLeftAndRightCalendar
+{
+    // 配置上个月和下个月的数据源
+    self.collectionViews.firstObject.yearAndMonth = [ALCalendarHelper lastYearAndMonth:self.header.title];
+    self.collectionViews.lastObject.yearAndMonth = [ALCalendarHelper nextYearAndMonth:self.header.title];
+}
+
+#pragma mark - UIScrollViewDelegate
+
+- (void)scrollViewDidEndScrollingAnimation:(UIScrollView *)scrollView
+{
+    [self.scrollView setContentOffset:CGPointMake(self.width, 0) animated:NO];
+    
+    [self setupLeftAndRightCalendar];
+}
+
+- (void)scrollViewDidEndDecelerating:(UIScrollView *)scrollView
+{
+    CGFloat offsetX = scrollView.contentOffset.x;
+    CGFloat page    = offsetX / self.width;
+    if (page == 2) {
+        [self showRightCalendar];
+    } else if (page == 0) {
+        [self showLeftCalendar];
+    }
+    
+    [self.scrollView setContentOffset:CGPointMake(self.width, 0) animated:NO];
+    
+    // 配置上个月和下个月的数据源
+    [self setupLeftAndRightCalendar];
+}
+
+#pragma mark - ALCalendarHeaderDelegate
+
+- (void)header:(ALCalendarHeader *)header didClickLeftBtn:(UIButton *)button
+{
+    [self showLeftCalendar];
+}
+
+- (void)header:(ALCalendarHeader *)header didClickRightBtn:(UIButton *)button
+{
+    [self showRightCalendar];
+}
+
+#pragma mark - ALCalendarCollectionViewDelegate
+
+- (void)calendarView:(ALCalendarCollectionView *)calendarCollectionView didSelectItem:(ALCalendarDate *)date dateString:(NSString *)dateString
+{
+    if ([self.delegate respondsToSelector:@selector(calendarPicker:didSelectItem:dateString:)]) {
+        [self.delegate calendarPicker:self didSelectItem:date dateString:dateString];
+    }
+}
+
+#pragma mark - private method
+
+- (void)refreshCollectionView:(BOOL)next
+{
+    if (next) { // 滚到下一页
+        [self.scrollView setContentOffset:CGPointMake(2 * self.width , 0) animated:YES];
+    } else { // 滚到上一页
+        [self.scrollView setContentOffset:CGPointMake(0, 0) animated:YES];
+    }
+    self.collectionViews[1].yearAndMonth = self.header.title;
+}
+
+#pragma mark - setter & getter
+
+- (ALCalendarHeader *)header
+{
+    if (!_header) {
+        _header                = [[ALCalendarHeader alloc] init];
+        // 初始化为当前月份和年份
+        _header.title          = [ALCalendarHelper currentYearAndMonth];
+        _header.delegate       = self;
+    }
+    return _header;
+}
+
+- (void)setBeginYearMonth:(NSString *)beginYearMonth
+{
+    _beginYearMonth            = beginYearMonth;
+    self.header.beginYearMonth = beginYearMonth;
+}
+
+- (UIScrollView *)scrollView
+{
+    if (!_scrollView) {
+        _scrollView = [[UIScrollView alloc] init];
+        _scrollView.pagingEnabled = YES;
+        CGFloat height = self.height - headerHeight;
+        _scrollView.contentSize = (CGSize){self.width * 3,height};
+        _scrollView.delegate = self;
+        for (NSInteger i = 0; i < 3 ; i++) {
+            ALCalendarCollectionView *collectionView = [[ALCalendarCollectionView alloc] initWithFrame:CGRectMake(self.width * i, 0, self.width,height) collectionViewLayout:[[UICollectionViewFlowLayout alloc] init]];
+            collectionView.collectionViewDelegate = self;
+            collectionView.yearAndMonth = nil;
+            if (i == 0) {
+                collectionView.yearAndMonth = [ALCalendarHelper lastYearAndMonth:self.header.title];
+            }else if (i == 1) {
+                collectionView.yearAndMonth = [ALCalendarHelper currentYearAndMonth];
+            } else if (i == 2) {
+                collectionView.yearAndMonth = [ALCalendarHelper nextYearAndMonth:self.header.title];
+            }
+            [self.collectionViews addObject:collectionView];
+            [self.scrollView addSubview:collectionView];
+        }
+        _scrollView.showsHorizontalScrollIndicator = NO;
+//        _scrollView.scrollEnabled = NO;
+        [_scrollView setContentOffset:CGPointMake(self.width, 0) animated:NO];
+    }
+    return _scrollView;
+}
+
+- (NSMutableArray<ALCalendarCollectionView *> *)collectionViews
+{
+    if (!_collectionViews) {
+        _collectionViews = [NSMutableArray array];
+    }
+    return _collectionViews;
+}
+
+- (void)setHightLightItems:(NSArray<NSString *> *)hightLightItems
+{
+    _hightLightItems = hightLightItems;
+    self.config.heightlightDates = hightLightItems;
+}
+
+- (void)setHightlightPriority:(BOOL)hightlightPriority
+{
+    _hightlightPriority = hightlightPriority;
+    self.config.hightlightPriority = hightlightPriority;
+}
+
+- (ALCalendarConfig *)config
+{
+    if (!_config) {
+        _config = [[ALCalendarConfig alloc] init];
+    }
+    return _config;
+}
+
+@end
diff --git a/ALCalendarPicker/UIView+Frame.h b/ALCalendarPicker/UIView+Frame.h
new file mode 100755
index 0000000..24f9067
--- /dev/null
+++ b/ALCalendarPicker/UIView+Frame.h
@@ -0,0 +1,24 @@
+//
+//  UIView+Frame.h
+//  ArcBlog
+//
+//  Created by Arclin on 15/11/18.
+//  Copyright © 2015年 sziit. All rights reserved.
+//
+
+#import <UIKit/UIKit.h>
+
+@interface UIView (Frame)
+
+// 分类不能添加成员属性
+// @property如果在分类里面，只会自动生成get,set方法的声明，不会生成带有下划线的成员属性，和方法的实现
+
+@property (nonatomic,assign) CGFloat centerX;
+@property (nonatomic,assign) CGFloat centerY;
+@property (nonatomic,assign) CGSize size;
+@property (nonatomic,assign) CGFloat x;
+@property (nonatomic,assign) CGFloat y;
+@property (nonatomic,assign) CGFloat width;
+@property (nonatomic,assign) CGFloat height;
+
+@end
diff --git a/ALCalendarPicker/UIView+Frame.m b/ALCalendarPicker/UIView+Frame.m
new file mode 100755
index 0000000..18024c5
--- /dev/null
+++ b/ALCalendarPicker/UIView+Frame.m
@@ -0,0 +1,85 @@
+//
+//  UIView+Frame.m
+//  ArcBlog
+//
+//  Created by Arclin on 15/11/18.
+//  Copyright © 2015年 sziit. All rights reserved.
+//
+
+#import "UIView+Frame.h"
+
+@implementation UIView (Frame)
+
+- (void)setCenterX:(CGFloat)centerX{
+    CGPoint center = self.center;
+    center.x = centerX;
+    self.center = center;
+}
+
+- (CGFloat)centerX{
+    return self.center.x;
+}
+
+
+- (void)setCenterY:(CGFloat)centerY{
+    CGPoint center = self.center;
+    center.y = centerY;
+    self.center = center;
+}
+
+- (CGFloat)centerY{
+    return self.center.y;
+}
+
+- (void)setSize:(CGSize)size{
+    CGRect frame = self.frame;
+    frame.size = size;
+    self.frame = frame;
+}
+
+- (CGSize)size{
+    return self.frame.size;
+}
+
+- (void)setX:(CGFloat)x{
+    CGRect frame = self.frame;
+    frame.origin.x = x;
+    self.frame = frame;
+}
+
+- (CGFloat)x{
+    return self.frame.origin.x;
+}
+
+- (void)setY:(CGFloat)y{
+    CGRect frame = self.frame;
+    frame.origin.y = y;
+    self.frame = frame;
+}
+
+- (CGFloat)y{
+    return self.frame.origin.y;
+    
+}
+
+- (void)setWidth:(CGFloat)width{
+    CGRect frame = self.frame;
+    frame.size.width = width;
+    self.frame = frame;
+}
+
+- (CGFloat)width{
+    return self.frame.size.width;
+}
+
+- (void)setHeight:(CGFloat)height{
+    CGRect frame = self.frame;
+    frame.size.height = height;
+    self.frame = frame;
+}
+
+- (CGFloat)height{
+    return self.frame.size.height;
+}
+
+@end