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- (Entry*)entryForDate:(NSDate *)date inContext:(NSManagedObjectContext*)context{
    
    NSFetchRequest *request = [[NSFetchRequest alloc]initWithEntityName:@"Entry"];
    
    NSPredicate *predicate = [NSPredicate predicateWithFormat:@"since >= %@",date];
    request.predicate = predicate;
    
    NSSortDescriptor *sort = [NSSortDescriptor sortDescriptorWithKey:@"since" ascending:YES];
    request.sortDescriptors = @[sort];
    

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- (UIView *)loadWithNib {
    NSArray *aNib = [[NSBundle mainBundle]loadNibNamed:NSStringFromClass([self class]) owner:self options:nil];
    UIView *view = [aNib objectAtIndex:0];

    return view;
}

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// Return the month name
+ (NSString*)monthName:(NSInteger)month{
    
    NSDateFormatter *formatter = [[NSDateFormatter alloc] init];
    formatter.locale = [NSLocale currentLocale];
    
    NSString *monthName = [[formatter monthSymbols] objectAtIndex:(month - 1)];
    
    return monthName;
}

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// Return integer representation of the required unit for the given date
// Note: It assumes that the current calendar is set to Gregorian
+ (NSInteger)unit:(NSCalendarUnit)unit forDate:(NSDate*)date{
    
    // Get the calendar
    NSCalendar *calendar = [[NSCalendar alloc]initWithCalendarIdentifier:NSGregorianCalendar];
    [calendar setTimeZone:[NSTimeZone defaultTimeZone]];
    
    // Get the component
    NSDateComponents *componets = [calendar components:unit fromDate:date];

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// Reset the time information to 00:00:00
- (NSDate*)resetTimeForDate:(NSDate*)date{
    
    NSDateComponents *components = [[NSCalendar currentCalendar] components:NSYearCalendarUnit|NSMonthCalendarUnit|NSDayCalendarUnit
                                                                   fromDate:date];
    [components setTimeZone:[NSTimeZone defaultTimeZone]];
    NSDate *clearedDate = [[NSCalendar currentCalendar] dateFromComponents:components];
    
    return clearedDate;
}

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// Return an array:
// Index 0: NSDate for the First day of the month
// Index 1: NSDate for the Last day of the month
+ (NSArray *)dateRangeForYear:(NSInteger)year Month:(NSInteger)month{
    
    // Build calendar and date components
    NSCalendar* calendar = [NSCalendar currentCalendar];
    NSDateComponents* dateComps = [[NSDateComponents alloc] init];
    
    // Set the month

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+ (NSArray*)allEntriesInContext:(NSManagedObjectContext*)context fromDate:(NSDate*)fromDate toDate:(NSDate*)toDate{
    
    // Create the request
    NSFetchRequest *request = [[NSFetchRequest alloc]initWithEntityName:@"Entry"];
    // Build the predicate
    NSPredicate *predicate = [NSPredicate predicateWithFormat: @"date >= %@ && date <= %@ ", fromDate, toDate];
    request.predicate = predicate;
    // Define sorting
    NSSortDescriptor *sortDesc = [NSSortDescriptor sortDescriptorWithKey:@"date" ascending:YES];
    request.sortDescriptors = @[sortDesc];

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// From your project -> Edit scheme
// Tab "Run" 
// Section "Argument passed at Lauch" 

// Add this argument
-com.apple.CoreData.SQLDebug 1

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+ (NSDate *)dateWithYear:(NSInteger)year month:(NSInteger)month day:(NSInteger)day {
    
    NSCalendar *calendar = [[NSCalendar alloc] initWithCalendarIdentifier:NSGregorianCalendar];
    
    NSDateComponents *components = [[NSDateComponents alloc] init];
    [components setYear:year];
    [components setMonth:month];
    [components setDay:day];
    
    return [calendar dateFromComponents:components];

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// Add Remove child controllers to a custom container controller with Animations
// ADD THE CHILD CONTROLLER   
self.childController = theChildController;
self.childController.view.frame = setupInitialChildControllerFrame();
[self addChildViewController:self.childController];
[self.view addSubview:self.childController.view];
[self.childController didMoveToParentViewController:self];

[UIView animateWithDuration:1.0
                      delay:0.0