diff --git a/src/pretix/static/pretixcontrol/js/ui/checkinrules/constants.ts b/src/pretix/static/pretixcontrol/js/ui/checkinrules/constants.ts
index e802ec260..8b284acd9 100644
--- a/src/pretix/static/pretixcontrol/js/ui/checkinrules/constants.ts
+++ b/src/pretix/static/pretixcontrol/js/ui/checkinrules/constants.ts
@@ -191,3 +191,8 @@ export const DATETIME_OPTIONS = {
 		close: 'fa fa-remove'
 	}
 }
+
+export const TIME_OPTIONS = {
+	...DATETIME_OPTIONS,
+	format: document.body.dataset.timeformat,
+}
diff --git a/src/pretix/static/pretixcontrol/js/ui/checkinrules/timefield.vue b/src/pretix/static/pretixcontrol/js/ui/checkinrules/timefield.vue
index f728a4a5f..f5c5aea22 100644
--- a/src/pretix/static/pretixcontrol/js/ui/checkinrules/timefield.vue
+++ b/src/pretix/static/pretixcontrol/js/ui/checkinrules/timefield.vue
@@ -1,6 +1,6 @@
 <script setup lang="ts">
 import { ref, watch, onMounted, onUnmounted } from 'vue'
-import { DATETIME_OPTIONS } from './constants'
+import { TIME_OPTIONS } from './constants'
 
 const props = defineProps<{
 	required?: boolean
@@ -20,7 +20,7 @@ watch(() => props.value, (val) => {
 onMounted(() => {
 	$(input.value)
 		.datetimepicker({
-			...DATETIME_OPTIONS,
+			...TIME_OPTIONS,
 			showClear: props.required,
 		})
 		.trigger('change')