Separate a search phrase from a feature
The official Tidy Up the Town store and developer press kit cited below do not document a Samhainn co-op mode or event. A seasonal community activity elsewhere is not evidence of an in-game quest, map or multiplayer system. This page therefore cannot give an event start time or joining procedure.
Use the confirmed game format
The official listing identifies Tidy Up the Town as single-player, with optional leaderboard competition. It focuses on sorting a magical market rather than joining a shared seasonal cleanup session. A leaderboard score comparison is different from cooperative play.
Check any claimed announcement
Look for the Pawsmonaut Games name and the correct Steam app before accepting an event link. If you saw the term inside your game, include a screenshot and version when asking in the official discussion hub. See co-op information and update verification for related questions.