# Namespace OptimaJet.Workflow.Core.Runtime.Calendars

## Classes

-   [Calendar](https://api.workflowengine.io/core/OptimaJet.Workflow.Core.Runtime.Calendars/Calendar/)
    
    Represents a work calendar.
    
-   [CalendarExtensions](https://api.workflowengine.io/core/OptimaJet.Workflow.Core.Runtime.Calendars/CalendarExtensions/)
    
    Provides extension methods for configuring [Calendar](https://api.workflowengine.io/core/OptimaJet.Workflow.Core.Runtime.Calendars/Calendar/) instances and calculating intervals using workflow calendar rules.
    
-   [MonthDay](https://api.workflowengine.io/core/OptimaJet.Workflow.Core.Runtime.Calendars/MonthDay/)
    
    Represents a day of a month.
    
-   [Workday](https://api.workflowengine.io/core/OptimaJet.Workflow.Core.Runtime.Calendars/Workday/)
    
    Represents the workday settings for a specific calendar date.
    
-   [Year](https://api.workflowengine.io/core/OptimaJet.Workflow.Core.Runtime.Calendars/Year/)
    
    Represents workday settings for a calendar year.
    

## Interfaces

-   [ICalendar](https://api.workflowengine.io/core/OptimaJet.Workflow.Core.Runtime.Calendars/ICalendar/)
    
    Represents a calendar that defines workdays and working-time boundaries.
    

## Enums

-   [Months](https://api.workflowengine.io/core/OptimaJet.Workflow.Core.Runtime.Calendars/Months/)
    
    Represents the months of the calendar year.