Evergreen time-based releases occur every six months with each major release getting 15 months of support (12 for general bugs and 3 more for security).

Releases are planned for (roughly) March and September since this works best for public libraries and at the same time gives academic/government institutions extra time to plan summer upgrades. This should also allow the community to expect a more predictable release cycle.

Below shows examples of how this schedule applies to the current Evergreen supported releases.

The Evergreen developer community plans bug-fix point releases on the third Wednesday of every month. There may be exceptions to this schedule, for example, when a critical bug requires more immediacy in the next point release or when there aren't a sufficient number of bug fixes to warrant a new release.