GitHub - pimutils/vdirsyncer: 📇 Synchronize calendars and contacts.

vdirsyncer is a command-line tool for synchronizing calendars and addressbooks between various servers and the local filesystem. It aims to provide similar functionality for calendars and contacts as OfflineIMAP does for emails. The most common use case is to sync a server with a local folder, then use other programs to modify the local events and contacts before syncing those changes back to the server. Additionally, vdirsyncer can be used to directly sync calendars and/or addressbooks between two servers.