diff --git a/libcxx/test/std/localization/locale.categories/category.time/locale.time.get.byname/get_one.pass.cpp b/libcxx/test/std/localization/locale.categories/category.time/locale.time.get.byname/get_one.pass.cpp
--- a/libcxx/test/std/localization/locale.categories/category.time/locale.time.get.byname/get_one.pass.cpp
+++ b/libcxx/test/std/localization/locale.categories/category.time/locale.time.get.byname/get_one.pass.cpp
@@ -9,8 +9,6 @@
 // NetBSD does not support LC_TIME at the moment
 // XFAIL: netbsd
 
-// XFAIL: LIBCXX-WINDOWS-FIXME
-
 // REQUIRES: locale.en_US.UTF-8
 // REQUIRES: locale.fr_FR.UTF-8
 // REQUIRES: locale.ru_RU.UTF-8
@@ -23,9 +21,6 @@
 // iter_type get(iter_type s, iter_type end, ios_base& f,
 //               ios_base::iostate& err, tm *t, char format, char modifier = 0) const;
 
-// TODO: investigation needed
-// XFAIL: target={{.*}}-linux-gnu{{.*}}
-
 #include <locale>
 #include <cassert>
 #include "test_macros.h"
@@ -52,7 +47,15 @@
     std::tm t;
     {
         const my_facet f(LOCALE_en_US_UTF_8, 1);
+#ifdef _WIN32
+        // On Windows, the "%c" format lacks the leading week day, which
+        // means that t.tm_wday doesn't get set when parsing the string.
+        const char in[] = "12/31/2061 11:55:59 PM";
+#elif defined(TEST_HAS_GLIBC)
+        const char in[] = "Sat 31 Dec 2061 11:55:59 PM";
+#else
         const char in[] = "Sat Dec 31 23:55:59 2061";
+#endif
         err = std::ios_base::goodbit;
         t = std::tm();
         I i = f.get(I(in), I(in+sizeof(in)/sizeof(in[0])-1), ios, err, &t, 'c');
@@ -63,12 +66,18 @@
         assert(t.tm_mday == 31);
         assert(t.tm_mon == 11);
         assert(t.tm_year == 161);
+#ifndef _WIN32
         assert(t.tm_wday == 6);
+#endif
         assert(err == std::ios_base::eofbit);
     }
     {
         const my_facet f(LOCALE_en_US_UTF_8, 1);
+#if defined(_WIN32) || defined(TEST_HAS_GLIBC)
+        const char in[] = "11:55:59 PM";
+#else
         const char in[] = "23:55:59";
+#endif
         err = std::ios_base::goodbit;
         t = std::tm();
         I i = f.get(I(in), I(in+sizeof(in)/sizeof(in[0])-1), ios, err, &t, 'X');
@@ -80,7 +89,13 @@
     }
     {
         const my_facet f(LOCALE_fr_FR_UTF_8, 1);
+#ifdef _WIN32
+        const char in[] = "31/12/2061 23:55:59";
+#elif defined(TEST_HAS_GLIBC)
+        const char in[] = "sam. 31 d""\xC3\xA9""c. 2061 23:55:59";
+#else
         const char in[] = "Sam 31 d""\xC3\xA9""c 23:55:59 2061";
+#endif
         err = std::ios_base::goodbit;
         t = std::tm();
         I i = f.get(I(in), I(in+sizeof(in)/sizeof(in[0])-1), ios, err, &t, 'c');
@@ -91,7 +106,9 @@
         assert(t.tm_mday == 31);
         assert(t.tm_mon == 11);
         assert(t.tm_year == 161);
+#ifndef _WIN32
         assert(t.tm_wday == 6);
+#endif
         assert(err == std::ios_base::eofbit);
     }
     {
@@ -108,6 +125,12 @@
     }
     {
         const my_facet f(LOCALE_ru_RU_UTF_8, 1);
+#ifdef TEST_HAS_GLIBC
+        const char in[] = "\xD0\xA1\xD0\xB1 31 \xD0\xB4\xD0\xB5\xD0\xBA"
+                          " 2061 23:55:59";
+#elif defined(_WIN32)
+        const char in[] = "31.12.2061 23:55:59";
+#else
         const char in[] = "\xD1\x81\xD1\x83\xD0\xB1\xD0\xB1"
                           "\xD0\xBE\xD1\x82\xD0\xB0"
                           ", 31 "
@@ -116,6 +139,7 @@
                           " 2061 "
                           "\xD0\xB3"
                           ". 23:55:59";
+#endif
         err = std::ios_base::goodbit;
         t = std::tm();
         I i = f.get(I(in), I(in+sizeof(in)/sizeof(in[0])-1), ios, err, &t, 'c');
@@ -126,7 +150,9 @@
         assert(t.tm_mday == 31);
         assert(t.tm_mon == 11);
         assert(t.tm_year == 161);
+#ifndef _WIN32
         assert(t.tm_wday == 6);
+#endif
         assert(err == std::ios_base::eofbit);
     }
     {
@@ -143,8 +169,18 @@
     }
     {
         const my_facet f(LOCALE_zh_CN_UTF_8, 1);
+#ifdef TEST_HAS_GLIBC
+        const char in[] = "2061" "\xE5\xB9\xB4" "12" "\xE6\x9C\x88" "31"
+                          "\xE6\x97\xA5" " "
+                          "\xE6\x98\x9F\xE6\x9c\x9F\xE5\x85\xAD"
+                          " 23" "\xE6\x97\xB6" "55" "\xE5\x88\x86" "59"
+                          "\xE7\xA7\x92";
+#elif defined(_WIN32)
+        const char in[] = "2061/12/31 23:55:59";
+#else
         const char in[] = "\xE5\x85\xAD"
                           " 12/31 23:55:59 2061";
+#endif
         err = std::ios_base::goodbit;
         t = std::tm();
         I i = f.get(I(in), I(in+sizeof(in)/sizeof(in[0])-1), ios, err, &t, 'c');
@@ -155,12 +191,18 @@
         assert(t.tm_mday == 31);
         assert(t.tm_mon == 11);
         assert(t.tm_year == 161);
+#ifndef _WIN32
         assert(t.tm_wday == 6);
+#endif
         assert(err == std::ios_base::eofbit);
     }
     {
         const my_facet f(LOCALE_zh_CN_UTF_8, 1);
+#if defined(_WIN32)
+        const char in[] = "23:55:59";
+#else
         const char in[] = "23""\xE6\x97\xB6""55""\xE5\x88\x86""59""\xE7\xA7\x92";
+#endif
         err = std::ios_base::goodbit;
         t = std::tm();
         I i = f.get(I(in), I(in+sizeof(in)/sizeof(in[0])-1), ios, err, &t, 'X');