diff --git a/maintenance.md b/maintenance.md
index ae4898a..544a7b1 100644
--- a/maintenance.md
+++ b/maintenance.md
@@ -30,3 +30,4 @@ Newest entries at the bottom.
 - 2026-09-20: Fire extinguishers checked.
 - 2026-09-20: Oxygen scrubbers replaced.
 - 2026-09-21: Solar panels cleaned.
+- 2026-09-21: Gyroscopes recalibrated.