diff --git a/package.json b/package.json
index 69fb91f..4c86ca0 100644
--- a/package.json
+++ b/package.json
@@ -65,7 +65,7 @@
     "clean": "rimraf build",
     "build": "craco build",
     "optimise": "gzip -kr build/static",
-    "full-build": "npm run clean; NODE_ENV=production GENERATE_SOURCEMAP=false npm run build; npm run optimise",
+    "full-build": "npm run clean; NODE_ENV=production npm run build; npm run optimise",
     "analyze-build": "FORCE_ANALYZE=true npm run build",
     "test": "craco test"
   },
diff --git a/src/components/DateTime.tsx b/src/components/DateTime.tsx
index 7115e93..85ca12d 100644
--- a/src/components/DateTime.tsx
+++ b/src/components/DateTime.tsx
@@ -13,6 +13,9 @@
 
 import "./DateTime.less";
 
+import Debug from "debug";
+const debug = Debug("kristweb:date-time");
+
 interface OwnProps {
   date?: Date | string | null;
   timeAgo?: boolean;
@@ -40,9 +43,20 @@
   const showRelativeDates = useBooleanSetting("showRelativeDates");
 
   if (!date) return null;
-  const realDate = typeof date === "string" ? new Date(date) : date;
-  const relative = Date.now() - realDate.getTime();
 
+  // Attempt to convert the date, failing safely
+  let realDate: Date;
+  try {
+    realDate = typeof date === "string" ? new Date(date) : date;
+    // Some browsers don't throw until the date is actually used
+    realDate.toISOString();
+  } catch (err) {
+    debug("error parsing date %s", date);
+    console.error(err);
+    return <>INVALID DATE</>;
+  }
+
+  const relative = Date.now() - realDate.getTime();
   const isTimeAgo = timeAgo || (showRelativeDates && !neverRelative && relative < RELATIVE_DATE_THRESHOLD);
 
   const classes = classNames("date-time", props.className, {
diff --git a/src/pages/dev/DevPage.tsx b/src/pages/dev/DevPage.tsx
index 390b62c..6858640 100644
--- a/src/pages/dev/DevPage.tsx
+++ b/src/pages/dev/DevPage.tsx
@@ -8,6 +8,7 @@
 import { ImportBackupModal } from "../backup/ImportBackupModal";
 import { SendTransactionModal } from "../transactions/send/SendTransactionModal";
 import { AuthorisedAction } from "@comp/auth/AuthorisedAction";
+import { DateTime } from "@comp/DateTime";
 
 import { useWallets, deleteWallet } from "@wallets";