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Installation
Grigoriy Ermolaev edited this page Sep 25, 2026
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Calendar requires MantisBT 2.26.0 or newer and PHP 7.4 or newer (the bundled dependencies need PHP 7.4). For MantisBT 2.14 – 2.25.x use the 2.6.x line (fixes only).
- Download
Calendar-vX.Y.Z.zipfrom the Assets of the latest release (not the "Source code" archive) and unpack it. - Copy the Calendar folder into the plugins folder.
- Open Mantis with browser.
- Log in as administrator.
- Go to Manage -> Manage Plugins.
- Find Calendar in the list.
- Click Install.
Replace the Calendar folder in plugins/ with the new one, then open Manage -> Manage Plugins and click Upgrade next to Calendar. Release notes of every version list the steps a particular upgrade needs; a release that migrates data asks for confirmation before touching the database.