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Maintenance and release schedule
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You can find the detailed schedule for major and maintenance releases at: `detailed schedule <https://github.com/nextcloud/server/wiki/Maintenance-and-Release-Schedule>`_.

Major releases
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Major releases are typically scheduled once every 4 months with the first 10 weeks being the development phase followed by freeze phase with four beta release, two RCs and one final each one with an interval of 1 week. Specific dates for each release can be found on `detailed schedule <https://github.com/nextcloud/server/wiki/Maintenance-and-Release-Schedule>`_.

Major releases are planned to be actively maintained for at least 8 months after their release. For long term support options check out the `Nextcloud Subscription <https://nextcloud.com/enterprise/>`_ offered by `Nextcloud GmbH <https://nextcloud.com>`_.

Maintenance releases
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Maintenance releases are scheduled in a 4 week cycle with one week before the release date having the freeze and RC 1.

Critical changes
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You can find important documentation for app developers here: https://docs.nextcloud.com/server/latest/developer_manual/app_publishing_maintenance/app_upgrade_guide/index.html
Each document lists a link to the breaking changes of the corresponding release.
