CalDAV¶

What it is¶

CalDAV is an internet standard allowing a client to access scheduling information on a remote server. It is used to synchronize calendars between different devices and services.

What problem it solves¶

Provides an open, standardized protocol for calendar synchronization, enabling interoperability between different calendar clients and servers without vendor lock-in.

Where it fits in the stack¶

Infrastructure. Serves as the underlying protocol for calendar synchronization between services like Nextcloud, Radicale, and other CalDAV-compatible clients.

Typical use cases¶

Synchronizing calendars across multiple devices and clients
Integrating self-hosted calendar servers with standard calendar apps
Enabling multi-calendar sync through automation tools like n8n

Strengths¶

Open standard with broad client and server support
Vendor-neutral; works across platforms and providers
Enables self-hosted calendar solutions

Limitations¶

Implementation quality varies across clients and servers
More complex to set up than using a single cloud provider
Troubleshooting sync issues can be difficult due to implementation differences

When to use it¶

When you need interoperable calendar sync across heterogeneous systems
When building a self-hosted calendar infrastructure

When not to use it¶

When a single cloud calendar provider meets all your needs
When you need features beyond basic calendar sync (e.g., advanced scheduling logic)

Sources / references¶

CalDAV.org

Contribution Metadata¶

Last reviewed: 2026-02-26
Confidence: medium