diff --git a/dll/win32/syssetup/wizard.c b/dll/win32/syssetup/wizard.c
index dd24193f5c..b98fcdc179 100644
--- a/dll/win32/syssetup/wizard.c
+++ b/dll/win32/syssetup/wizard.c
@@ -1544,6 +1544,8 @@ SetSystemLocalTime(HWND hwnd, PSETUPDATA SetupData)
 static VOID
 UpdateLocalSystemTime(HWND hwnd, SYSTEMTIME LocalTime)
 {
+    /* The next line fixes CORE-17199. The format must start with a space. */
+    DateTime_SetFormat(GetDlgItem(hwnd, IDC_DATEPICKER), L" dddd',' MMMM dd', ' yyyy");
     DateTime_SetSystemtime(GetDlgItem(hwnd, IDC_DATEPICKER), GDT_VALID, &LocalTime);
     DateTime_SetSystemtime(GetDlgItem(hwnd, IDC_TIMEPICKER), GDT_VALID, &LocalTime);
 }