diff --git a/CHANGELOG.md b/CHANGELOG.md
index 8f708fa..c6a30b9 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -19,6 +19,7 @@
 - Auth: keep Keep-only service-account fallback isolated to Keep commands so other Google services do not accidentally pick it up. (#414) — thanks @jgwesterlund.
 - Contacts: send the required `copyMask` when deleting "other contacts", avoiding People API 400 errors. (#384) — thanks @rbansal42.
 - Calendar: hide cancelled/deleted events from `calendar events` list output by explicitly setting `showDeleted=false`. (#362) — thanks @sharukh010.
+- Calendar: use `Calendars.Get` for timezone lookups so service-account flows don’t 404 on `calendarList/primary`. (#325) — thanks @markwatson.
 - Gmail: fall back to `MimeType` charset hints when `Content-Type` headers are missing so GBK/GB2312 message bodies decode correctly. (#428) — thanks @WinnCook.
 - Gmail: add a fetch delay in `watch serve` so History API reads don't race message indexing. (#397) — thanks @salmonumbrella.
 - Gmail: allow Workspace-managed send-as aliases with empty verification status in `send` and `drafts create`. (#407) — thanks @salmonumbrella.