---
type: concept
title: Group Calendar (Gruppenkalender)
tags: [collaboration, scheduling, groupware]
related: [groupware, ums, ressource-beantragen, kalender-ressource]
created: 2026-07-01
updated: 2026-07-01
sources: ["output/rz_uni_greifswald_de_dienste_webdienste_groupware_module_kalender_gruppenkalende.md"]
---

# Group Calendar (Gruppenkalender)

A **Group Calendar** is a shared calendar within the [[groupware]] platform used for organizational planning. It is distinct from a personal calendar and is designed for coordination across multiple users, functioning similarly to a personal calendar but accessible to multiple users based on assigned read/write permissions.

## Usage Scenarios

### Recommended Use Cases
Group calendars are specifically recommended for:
- **Vacation calendars** (Urlaubskalender)
- **On-call/Readiness calendars** (Bereitschaftskalender)
- **Shift plans** (Schichtplan)

### Non-Recommended Use Cases
- **Department Meetings:** For general meetings, the use of personal calendars with invitations is recommended (specifically recommended by the URZ).
- **Room or Equipment Booking:** For booking-based scenarios or booking physical resources, a [[kalender-ressource]] (Calendar Resource) should be used instead, allowing users to book the resource directly from their personal calendars.

## Provisioning and Administration
Group calendars are not generated automatically. They must be requested through the following process:

1. Submit a resource request via the [[ums]] (Account Management). The newly generated version specifies the resource type as `groupware_cal`.
2. The [[universitatsrechenzentrum-urz]] sets up the calendar and assigns administrative rights to the requester.
3. The requester/administrator is then responsible for configuring all further properties and user permissions.

## ⚠️ Critical Warning: Naming Convention
Group calendars are identified in the system by the prefix `gr_`. 

**Do not change this name.** If the `gr_` prefix is removed or altered, the calendar will be **automatically deleted** from the system.