diff --git a/koha-tmpl/intranet-tmpl/prog/css/src/_flatpickr.scss b/koha-tmpl/intranet-tmpl/prog/css/src/_flatpickr.scss
index 777ac6c993..165936c396 100644
--- a/koha-tmpl/intranet-tmpl/prog/css/src/_flatpickr.scss
+++ b/koha-tmpl/intranet-tmpl/prog/css/src/_flatpickr.scss
@@ -947,6 +947,11 @@ span.flatpickr-weekday {
     border-width: 1px;
     padding: 3px 3px 3px 20px;
 
+    &.flatpickr-mobile {
+        height: 2rem;
+        width: 11rem;
+    }
+
     &:focus {
         border-radius: 0;
     }
diff --git a/koha-tmpl/opac-tmpl/bootstrap/css/src/_flatpickr.scss b/koha-tmpl/opac-tmpl/bootstrap/css/src/_flatpickr.scss
index 323418d78e..042e0fc062 100644
--- a/koha-tmpl/opac-tmpl/bootstrap/css/src/_flatpickr.scss
+++ b/koha-tmpl/opac-tmpl/bootstrap/css/src/_flatpickr.scss
@@ -843,6 +843,11 @@ span.flatpickr-weekday {
     border-width: 1px;
     padding: 3px 3px 3px 20px;
 
+    &.flatpickr-mobile {
+        height: 2rem;
+        width: 11rem;
+    }
+
     &:focus {
         border-radius: 0;
     }