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# Synapse Release Cycle
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Releases of Synapse follow a two week release cycle with new releases usually
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occurring on Tuesdays:
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* Day 0: Synapse `N - 1` is released.
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* Day 7: Synapse `N` release candidate 1 is released.
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* Days 7 - 13: Synapse `N` release candidates 2+ are released, if bugs are found.
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* Day 14: Synapse `N` is released.
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Note that this schedule might be modified depending on the availability of the
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Synapse team, e.g. releases may be skipped to avoid holidays.
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Release announcements can be found in the
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[release category of the Matrix blog](https://matrix.org/category/releases).
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## Bugfix releases
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If a bug is found after release that is deemed severe enough (by a combination
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of the impacted users and the impact on those users) then a bugfix release may
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be issued. This may be at any point in the release cycle.
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## Security releases
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Security will sometimes be backported to the previous version and released
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immediately before the next release candidate. An example of this might be:
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* Day 0: Synapse N - 1 is released.
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* Day 7: Synapse (N - 1).1 is released as Synapse N - 1 + the security fix.
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* Day 7: Synapse N release candidate 1 is released (including the security fix).
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Depending on the impact and complexity of security fixes, multiple fixes might
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be held to be released together.
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In some cases, a pre-disclosure of a security release will be issued as a notice
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to Synapse operators that there is an upcoming security release. These can be
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found in the [security category of the Matrix blog](https://matrix.org/category/security).
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