diff --git a/app/common/ValueCache.mjs b/app/common/ValueCache.mjs
index b57a477..fffa391 100644
--- a/app/common/ValueCache.mjs
+++ b/app/common/ValueCache.mjs
@@ -38,8 +38,15 @@ export default class ValueCache
     return item && item.data;
   }
 
+  async getCachedAt() {
+    let item = await this._getRawItem();
+
+    return (item && item.cachedAt) ? new Date(item.cachedAt) : null;
+  }
+
   async setData(data, expires = null) {
-    let serialized = JSON.stringify({ expires, data }, undefined, 2);
+    let cachedAt = new Date;
+    let serialized = JSON.stringify({ expires, data, cachedAt }, undefined, 2);
 
     await mkdirp(path.dirname(this.path));
     await fs.writeFile(this.path, serialized);
diff --git a/app/data/updaters/FestivalUpdater.mjs b/app/data/updaters/FestivalUpdater.mjs
index 6b1aba1..3da6abd 100644
--- a/app/data/updaters/FestivalUpdater.mjs
+++ b/app/data/updaters/FestivalUpdater.mjs
@@ -81,13 +81,14 @@ export default class FestivalUpdater extends DataUpdater
     // We don't need to use the locale for this data
     // since localization data retrieval happens elsewhere.
     let data = await cache.getData();
+    let cachedAt = await cache.getCachedAt();
 
     // How long until this festival ends/ended?
     // We want to retrieve the latest data until 4 hours after the Splatfest ends
-    let diff = Date.now() - new Date(node.endTime);
-    let forceUpdate = (diff < 4 * 60 * 60 * 1000);
+    let cutoff = new Date(node.endTime);
+    cutoff.setHours(cutoff.getHours() + 4);
 
-    if (forceUpdate || !data) {
+    if (!data || cachedAt < cutoff) {
       this.console.info(`Getting festival details for ${node.id}`);
       data = await this.splatnet().getFestDetailData(node.id);
       await cache.setData(data);