diff --git a/src/node_report.cc b/src/node_report.cc
index 69ae0ee53eb292..a9861f931e847c 100644
--- a/src/node_report.cc
+++ b/src/node_report.cc
@@ -247,7 +247,7 @@ static void WriteNodeReport(Isolate* isolate,
 #ifdef _WIN32
   snprintf(timebuf,
            sizeof(timebuf),
-           "%4d/%02d/%02d %02d:%02d:%02d",
+           "%4d-%02d-%02dT%02d:%02d:%02dZ",
            tm_struct->wYear,
            tm_struct->wMonth,
            tm_struct->wDay,