---
title: "Set-up and maintain calendars"
url: "https://help.altus.pro/nl/article/set-up-and-maintain-resource-calendars"
language: "nl"
last_updated: "2026-03-31T05:18:01.699Z"
---

# Set-up and maintain calendars

Enterprise calendars allow organisations to define **standard working times** and **company‑wide non‑working exceptions**, such as statutory holidays, in a single, centralised calendar.

These calendars are used to **calculate and determine resource capacity** across Altus, ensuring availability and utilisation are based on consistent working time rules.

By applying an enterprise calendar, Altus accurately reflects when resources are available to work, which directly impacts capacity calculations displayed throughout the platform.  
  
  
To create and maintain enterprise calendars:  

1.  Ensure you are in the **Resources** area, click **Resources** in the **Resources** section.  
       
    
2.  Click **+New** from the command bar to create a new enterprise calendar or select and edit an existing calendar to make changes to an existing enterprise calendar  
      
    
3.  Ensure the calendar’s **name** clearly defines the **working time** defined by the calendar.  
      
    
4.  Toggle on/off the typical **working days** for a week.  
       
    
5.  Define the **number of working hours** per day.  
       
    
6.  Click **Save** to update or create the enterprise calendar  
    

  
To create or update calendar exceptions:  

1.  Ensure you are in the calendar in which you want to define **calendar exceptions.**  
      
    
2.  Click the **Exceptions** tab.  
      
    
3.  Click **+New Calendar Exception f**rom the command bar to create a new enterprise calendar exception, or select an existing calendar exception and then **More details** to make changes to an existing enterprise calendar exception, or **Delete** to remove it.  
      
    
4.  Give the calendar exception a **meaningful name.**  
      
    
5.  Define the **From** and **To Dates** for the exception.  
      
    
6.  Click **Save** to update the enterprise calendar.

  
  
**Resource Calendars** will be utilised as needed to over-ride the enterprise calendar on a resource-by-resource basis.   
  
  
To create and maintain resource calendars:  

1.  Ensure you are in the **Resources** area, click **Resources** in the **Resources** section.  
      
    
2.  Select and edit the resource for whom you wish to create a **calendar exception.**  
      
    
3.  Ensure you are editing the correct **Resource** and are on the **Calendar Exceptions** tab.  
      
    
4.  Click an **existing calendar exception** and then **More details** to update it or **Delete** to remove it; or click **New Calendar Exception** to create a new one.  
      
    
5.  Give the calendar exception a **meaningful name.**  
      
    
6.  Define the **From** and **To Dates** for the exception.  
      
    
7.  Click **Save** to update the enterprise calendar.