diff --git a/ui/.storybook/config.js b/ui/.storybook/config.js
index 6b1157a62..4e5a19555 100644
--- a/ui/.storybook/config.js
+++ b/ui/.storybook/config.js
@@ -2,9 +2,14 @@ import { configure, getStorybook, setAddon } from "@storybook/react";
 
 import createPercyAddon from "@percy-io/percy-storybook";
 
+import { advanceTo } from "jest-date-mock";
+
 const { percyAddon, serializeStories } = createPercyAddon();
 setAddon(percyAddon);
 
+// mock date so the silence form always shows same preview
+advanceTo(new Date(Date.UTC(2018, 7, 14, 17, 36, 40)));
+
 const req = require.context("../src/Components", true, /\.stories\.js$/);
 
 function loadStories() {