diff --git a/CHANGELOG.md b/CHANGELOG.md
index adba0f9ccd..dcdab95663 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -9,6 +9,7 @@ For advice on how to use these release notes, see [our guidance on staying up to
 We've made fixes to GOV.UK Frontend in the following pull requests:
 
 - [#6351: Preserve already escaped `attributes` values to prevent double escaping](https://github.com/alphagov/govuk-frontend/pull/6351) thanks to @colinrotherham for fixing this issue
+- [#6454: Prevent date inputs shifting alignment on iOS 18](https://github.com/alphagov/govuk-frontend/pull/6454) – thanks to @rowellx68 for reporting this issue and @colinrotherham for suggesting the fix.
 
 ## v6.0.0-beta.1 (Beta breaking release)
 
diff --git a/packages/govuk-frontend/src/govuk/components/date-input/_index.scss b/packages/govuk-frontend/src/govuk/components/date-input/_index.scss
index e812dd92d5..3b301cfa83 100644
--- a/packages/govuk-frontend/src/govuk/components/date-input/_index.scss
+++ b/packages/govuk-frontend/src/govuk/components/date-input/_index.scss
@@ -14,6 +14,11 @@
     display: inline-block;
     margin-right: govuk-spacing(4);
     margin-bottom: 0;
+
+    // Prevents an issue in iOS Safari 18 where the items vertically
+    // shift when the value of inputs is changed.
+    // https://github.com/alphagov/reported-bugs/issues/90
+    vertical-align: bottom;
   }
 
   .govuk-date-input__label {