diff --git a/categories/design/rules-to-better-interfaces-general-usability-practices.md b/categories/design/rules-to-better-interfaces-general-usability-practices.md
index 3806bcba997..c266e5df57f 100644
--- a/categories/design/rules-to-better-interfaces-general-usability-practices.md
+++ b/categories/design/rules-to-better-interfaces-general-usability-practices.md
@@ -10,6 +10,7 @@ index:
 - do-you-realize-that-a-good-interface-should-not-require-instructions
 - do-you-make-users-intuitively-know-how-to-use-something
 - always-reduce-complexity
+- date-and-time-of-change-as-tooltip
 - enforce-the-text-meaning-with-icons-and-emojis
 - add-a-spot-of-color-for-emphasis
 - do-you-understand-the-importance-of-language-in-your-ui
diff --git a/categories/design/rules-to-better-interfaces-reports-charts-and-dates.md b/categories/design/rules-to-better-interfaces-reports-charts-and-dates.md
index 3e3f77589a8..75e0547e27f 100644
--- a/categories/design/rules-to-better-interfaces-reports-charts-and-dates.md
+++ b/categories/design/rules-to-better-interfaces-reports-charts-and-dates.md
@@ -13,7 +13,6 @@ index:
 - dates-do-you-use-calendar-controls-effectively
 - reports-do-you-always-make-sure-the-dimensions-all-captions-all
 - reports-do-you-keep-reporting-criteria-simple
-- date-and-time-of-change-as-tooltip
 
 ---