diff --git a/config/locales/simple_form.cy.yml b/config/locales/simple_form.cy.yml
index ceca9b319f..b6f3a08c18 100644
--- a/config/locales/simple_form.cy.yml
+++ b/config/locales/simple_form.cy.yml
@@ -294,6 +294,7 @@ cy:
         usable: Caniatáu i bostiadau ddefnyddio'r hashnod hwn
       user:
         role: Rôl
+        time_zone: Cylchfa amser
       user_role:
         color: Lliw bathodyn
         highlighted: Dangos rôl fel bathodyn ar broffiliau defnyddwyr