diff --git a/dlls/msvcr100/msvcr100.spec b/dlls/msvcr100/msvcr100.spec
index 1570fd488e6..1eca0923117 100644
--- a/dlls/msvcr100/msvcr100.spec
+++ b/dlls/msvcr100/msvcr100.spec
@@ -392,7 +392,7 @@
 @ cdecl __crtCompareStringW(long long wstr long wstr long) msvcrt.__crtCompareStringW
 @ cdecl __crtLCMapStringA(long long str long ptr long long long) msvcrt.__crtLCMapStringA
 @ cdecl __crtLCMapStringW(long long wstr long ptr long long long) msvcrt.__crtLCMapStringW
-@ stub __daylight
+@ cdecl __daylight() msvcrt.__daylight
 @ cdecl __dllonexit(ptr ptr ptr) msvcrt.__dllonexit
 @ cdecl __doserrno() msvcrt.__doserrno
 @ stub __dstbias
diff --git a/dlls/msvcr80/msvcr80.spec b/dlls/msvcr80/msvcr80.spec
index 65f9510f3b6..e7b26e78133 100644
--- a/dlls/msvcr80/msvcr80.spec
+++ b/dlls/msvcr80/msvcr80.spec
@@ -205,7 +205,7 @@
 @ cdecl __crtGetStringTypeW(long long wstr long ptr) msvcrt.__crtGetStringTypeW
 @ cdecl __crtLCMapStringA(long long str long ptr long long long) msvcrt.__crtLCMapStringA
 @ cdecl __crtLCMapStringW(long long wstr long ptr long long long) msvcrt.__crtLCMapStringW
-@ stub __daylight
+@ cdecl __daylight() msvcrt.__daylight
 @ cdecl __dllonexit(ptr ptr ptr) msvcrt.__dllonexit
 @ cdecl __doserrno() msvcrt.__doserrno
 @ stub __dstbias
diff --git a/dlls/msvcr90/msvcr90.spec b/dlls/msvcr90/msvcr90.spec
index badfe65bcd8..9ba5bbca04d 100644
--- a/dlls/msvcr90/msvcr90.spec
+++ b/dlls/msvcr90/msvcr90.spec
@@ -202,7 +202,7 @@
 @ cdecl __crtGetStringTypeW(long long wstr long ptr) msvcrt.__crtGetStringTypeW
 @ cdecl __crtLCMapStringA(long long str long ptr long long long) msvcrt.__crtLCMapStringA
 @ cdecl __crtLCMapStringW(long long wstr long ptr long long long) msvcrt.__crtLCMapStringW
-@ stub __daylight
+@ cdecl __daylight() msvcrt.__daylight
 @ cdecl __dllonexit(ptr ptr ptr) msvcrt.__dllonexit
 @ cdecl __doserrno() msvcrt.__doserrno
 @ stub __dstbias
diff --git a/dlls/msvcrt/msvcrt.spec b/dlls/msvcrt/msvcrt.spec
index 5d07736569a..440eeb846a7 100644
--- a/dlls/msvcrt/msvcrt.spec
+++ b/dlls/msvcrt/msvcrt.spec
@@ -179,7 +179,7 @@
 @ cdecl __crtGetStringTypeW(long long wstr long ptr)
 @ cdecl __crtLCMapStringA(long long str long ptr long long long)
 @ cdecl __crtLCMapStringW(long long wstr long ptr long long long)
-# stub __daylight
+@ cdecl __daylight() MSVCRT___p__daylight
 @ cdecl __dllonexit(ptr ptr ptr)
 @ cdecl __doserrno() MSVCRT___doserrno
 # stub __dstbias
diff --git a/dlls/msvcrt/tests/time.c b/dlls/msvcrt/tests/time.c
index a56f53c196f..950042c2899 100644
--- a/dlls/msvcrt/tests/time.c
+++ b/dlls/msvcrt/tests/time.c
@@ -42,6 +42,8 @@ static errno_t    (__cdecl *p_strtime_s)(char*,size_t);
 static errno_t    (__cdecl *p_strdate_s)(char*,size_t);
 static errno_t    (__cdecl *p_localtime32_s)(struct tm*, __time32_t*);
 static errno_t    (__cdecl *p_localtime64_s)(struct tm*, __time64_t*);
+static int*       (__cdecl *p__daylight)(void);
+static int*       (__cdecl *p___p__daylight)(void);
 
 static void init(void)
 {
@@ -54,6 +56,8 @@ static void init(void)
     p_strdate_s = (void*)GetProcAddress(hmod, "_strdate_s");
     p_localtime32_s = (void*)GetProcAddress(hmod, "_localtime32_s");
     p_localtime64_s = (void*)GetProcAddress(hmod, "_localtime64_s");
+    p__daylight = (void*)GetProcAddress(hmod, "__daylight");
+    p___p__daylight = (void*)GetProcAddress(hmod, "__p__daylight");
 }
 
 static int get_test_year(time_t *start)
@@ -543,6 +547,27 @@ static void test_localtime64_s(void)
        tm.tm_isdst);
 }
 
+static void test_daylight(void)
+{
+    int *ret1, *ret2;
+
+    if (!p__daylight)
+    {
+        win_skip("__daylight() not available\n");
+        return;
+    }
+
+    if (!p___p__daylight)
+    {
+        win_skip("__p__daylight not available\n");
+        return;
+    }
+
+    ret1 = p__daylight();
+    ret2 = p___p__daylight();
+    ok(ret1 && ret1 == ret2, "got %p\n", ret1);
+}
+
 START_TEST(time)
 {
     init();
@@ -557,4 +582,5 @@ START_TEST(time)
     test_wstrtime();
     test_localtime32_s();
     test_localtime64_s();
+    test_daylight();
 }