# Calendar API: Local Calendars, Cloud Sync, and Conflict Handling

DevFeed: [Calendar API: Local Calendars, Cloud Sync, and Conflict Handling](<https://devfeed.tech/articles/calendar-api-local-calendars-cloud-sync-and-conflict-handling-19235.md>)

Original publisher: [Read original article](<https://www.codenameone.com/blog/calendar-is-not-add-event/>)

Author: Shai Almog

Published: 2026-07-25T00:00:00Z

Content type: release

Language: en

Sources: [CodeName One](<https://devfeed.tech/sources/codename-one.md>)

Topics: [API](<https://devfeed.tech/topics/api.md>), [cross-platform](<https://devfeed.tech/topics/cross-platform.md>), [Concurrency](<https://devfeed.tech/topics/concurrency.md>), [Cloud](<https://devfeed.tech/topics/cloud.md>), [Google Calendar](<https://devfeed.tech/topics/google-calendar.md>), [Android](<https://devfeed.tech/topics/android.md>), [iOS](<https://devfeed.tech/topics/ios.md>), [macOS](<https://devfeed.tech/topics/macos.md>), [Microsoft](<https://devfeed.tech/topics/microsoft.md>), [JavaScript](<https://devfeed.tech/topics/javascript.md>), [HTTP](<https://devfeed.tech/topics/http.md>), [OAuth](<https://devfeed.tech/topics/oauth.md>)

Tags: [android](<https://devfeed.tech/tags/android.md>), [api](<https://devfeed.tech/tags/api.md>), [apis](<https://devfeed.tech/tags/apis.md>), [apple](<https://devfeed.tech/tags/apple.md>), [backend](<https://devfeed.tech/tags/backend.md>), [cloud](<https://devfeed.tech/tags/cloud.md>), [concurrency](<https://devfeed.tech/tags/concurrency.md>), [cross-platform](<https://devfeed.tech/tags/cross-platform.md>), [google](<https://devfeed.tech/tags/google.md>), [http](<https://devfeed.tech/tags/http.md>), [ios](<https://devfeed.tech/tags/ios.md>), [javascript](<https://devfeed.tech/tags/javascript.md>), [macos](<https://devfeed.tech/tags/macos.md>), [oauth](<https://devfeed.tech/tags/oauth.md>), [offline](<https://devfeed.tech/tags/offline.md>), [storage](<https://devfeed.tech/tags/storage.md>), [sync](<https://devfeed.tech/tags/sync.md>), [synchronization](<https://devfeed.tech/tags/synchronization.md>), [work](<https://devfeed.tech/tags/work.md>)

## AI overview

The article introduces a cross-platform calendar API that unifies local calendars and cloud providers through a capability-based model. It covers events, tasks, recurrence, time zones, offline mutations, optimistic concurrency, provider synchronization, and conflict handling.

## Source excerpt

The new calendar API handles local calendars, cloud providers, recurrence, conflicts, and offline changes through one capability-based model.