diff --git a/DisplayCAL/meta.py b/DisplayCAL/meta.py
index 34048b91..00b9c82c 100644
--- a/DisplayCAL/meta.py
+++ b/DisplayCAL/meta.py
@@ -16,7 +16,7 @@
         VERSION_STRING,
     )
 except ImportError:
-    build = lastmod = "0000-00-00T00:00:00Z"
+    build = lastmod = "1970-01-01T00:00:00Z"
     VERSION = None
     VERSION_STRING = None