diff --git a/absl/time/internal/cctz/src/time_zone_info.cc b/absl/time/internal/cctz/src/time_zone_info.cc
index 8966f7a..657fe38 100644
--- a/absl/time/internal/cctz/src/time_zone_info.cc
+++ b/absl/time/internal/cctz/src/time_zone_info.cc
@@ -533,8 +533,8 @@
 
   // Trim redundant transitions. zic may have added these to work around
   // differences between the glibc and reference implementations (see
-  // zic.c:dontmerge) and the Qt library (see zic.c:WORK_AROUND_QTBUG_53071).
-  // For us, they just get in the way when we do future_spec_ extension.
+  // zic.c:dontmerge) or to avoid bugs in old readers. For us, they just
+  // get in the way when we do future_spec_ extension.
   while (hdr.timecnt > 1) {
     if (!EquivTransitions(transitions_[hdr.timecnt - 1].type_index,
                           transitions_[hdr.timecnt - 2].type_index)) {
diff --git a/absl/time/internal/cctz/src/zone_info_source.cc b/absl/time/internal/cctz/src/zone_info_source.cc
index 5ab5a59..b818c21 100644
--- a/absl/time/internal/cctz/src/zone_info_source.cc
+++ b/absl/time/internal/cctz/src/zone_info_source.cc
@@ -66,41 +66,41 @@
 extern ZoneInfoSourceFactory default_factory;
 ZoneInfoSourceFactory default_factory = DefaultFactory;
 #if defined(_M_IX86) || defined(_M_ARM)
-#pragma comment(                                                                                                         \
-    linker,                                                                                                              \
-    "/alternatename:?zone_info_source_factory@cctz_extension@time_internal@" ABSL_INTERNAL_MANGLED_NS                    \
-    "@@3P6A?AV?$unique_ptr@VZoneInfoSource@cctz@time_internal@" ABSL_INTERNAL_MANGLED_NS                                 \
-    "@@U?$default_delete@VZoneInfoSource@cctz@time_internal@" ABSL_INTERNAL_MANGLED_NS                                   \
-    "@@@std@@@std@@ABV?$basic_string@DU?$char_traits@D@std@@V?$allocator@D@2@@" ABSL_INTERNAL_MANGLED_BACKREFERENCE      \
-    "@ABV?$function@$$A6A?AV?$unique_ptr@VZoneInfoSource@cctz@time_internal@" ABSL_INTERNAL_MANGLED_NS                   \
-    "@@U?$default_delete@VZoneInfoSource@cctz@time_internal@" ABSL_INTERNAL_MANGLED_NS                                   \
-    "@@@std@@@std@@ABV?$basic_string@DU?$char_traits@D@std@@V?$allocator@D@2@@2@@Z@" ABSL_INTERNAL_MANGLED_BACKREFERENCE \
-    "@@ZA=?default_factory@cctz_extension@time_internal@" ABSL_INTERNAL_MANGLED_NS                                       \
-    "@@3P6A?AV?$unique_ptr@VZoneInfoSource@cctz@time_internal@" ABSL_INTERNAL_MANGLED_NS                                 \
-    "@@U?$default_delete@VZoneInfoSource@cctz@time_internal@" ABSL_INTERNAL_MANGLED_NS                                   \
-    "@@@std@@@std@@ABV?$basic_string@DU?$char_traits@D@std@@V?$allocator@D@2@@" ABSL_INTERNAL_MANGLED_BACKREFERENCE      \
-    "@ABV?$function@$$A6A?AV?$unique_ptr@VZoneInfoSource@cctz@time_internal@" ABSL_INTERNAL_MANGLED_NS                   \
-    "@@U?$default_delete@VZoneInfoSource@cctz@time_internal@" ABSL_INTERNAL_MANGLED_NS                                   \
-    "@@@std@@@std@@ABV?$basic_string@DU?$char_traits@D@std@@V?$allocator@D@2@@2@@Z@" ABSL_INTERNAL_MANGLED_BACKREFERENCE \
-    "@@ZA")
+#pragma comment(                                                                                                                 \
+        linker,                                                                                                                  \
+            "/alternatename:?zone_info_source_factory@cctz_extension@time_internal@" ABSL_INTERNAL_MANGLED_NS                    \
+            "@@3P6A?AV?$unique_ptr@VZoneInfoSource@cctz@time_internal@" ABSL_INTERNAL_MANGLED_NS                                 \
+            "@@U?$default_delete@VZoneInfoSource@cctz@time_internal@" ABSL_INTERNAL_MANGLED_NS                                   \
+            "@@@std@@@std@@ABV?$basic_string@DU?$char_traits@D@std@@V?$allocator@D@2@@" ABSL_INTERNAL_MANGLED_BACKREFERENCE      \
+            "@ABV?$function@$$A6A?AV?$unique_ptr@VZoneInfoSource@cctz@time_internal@" ABSL_INTERNAL_MANGLED_NS                   \
+            "@@U?$default_delete@VZoneInfoSource@cctz@time_internal@" ABSL_INTERNAL_MANGLED_NS                                   \
+            "@@@std@@@std@@ABV?$basic_string@DU?$char_traits@D@std@@V?$allocator@D@2@@2@@Z@" ABSL_INTERNAL_MANGLED_BACKREFERENCE \
+            "@@ZA=?default_factory@cctz_extension@time_internal@" ABSL_INTERNAL_MANGLED_NS                                       \
+            "@@3P6A?AV?$unique_ptr@VZoneInfoSource@cctz@time_internal@" ABSL_INTERNAL_MANGLED_NS                                 \
+            "@@U?$default_delete@VZoneInfoSource@cctz@time_internal@" ABSL_INTERNAL_MANGLED_NS                                   \
+            "@@@std@@@std@@ABV?$basic_string@DU?$char_traits@D@std@@V?$allocator@D@2@@" ABSL_INTERNAL_MANGLED_BACKREFERENCE      \
+            "@ABV?$function@$$A6A?AV?$unique_ptr@VZoneInfoSource@cctz@time_internal@" ABSL_INTERNAL_MANGLED_NS                   \
+            "@@U?$default_delete@VZoneInfoSource@cctz@time_internal@" ABSL_INTERNAL_MANGLED_NS                                   \
+            "@@@std@@@std@@ABV?$basic_string@DU?$char_traits@D@std@@V?$allocator@D@2@@2@@Z@" ABSL_INTERNAL_MANGLED_BACKREFERENCE \
+            "@@ZA")
 #elif defined(_M_IA_64) || defined(_M_AMD64) || defined(_M_ARM64)
-#pragma comment(                                                                                                          \
-    linker,                                                                                                               \
-    "/alternatename:?zone_info_source_factory@cctz_extension@time_internal@" ABSL_INTERNAL_MANGLED_NS                     \
-    "@@3P6A?AV?$unique_ptr@VZoneInfoSource@cctz@time_internal@" ABSL_INTERNAL_MANGLED_NS                                  \
-    "@@U?$default_delete@VZoneInfoSource@cctz@time_internal@" ABSL_INTERNAL_MANGLED_NS                                    \
-    "@@@std@@@std@@AEBV?$basic_string@DU?$char_traits@D@std@@V?$allocator@D@2@@" ABSL_INTERNAL_MANGLED_BACKREFERENCE      \
-    "@AEBV?$function@$$A6A?AV?$unique_ptr@VZoneInfoSource@cctz@time_internal@" ABSL_INTERNAL_MANGLED_NS                   \
-    "@@U?$default_delete@VZoneInfoSource@cctz@time_internal@" ABSL_INTERNAL_MANGLED_NS                                    \
-    "@@@std@@@std@@AEBV?$basic_string@DU?$char_traits@D@std@@V?$allocator@D@2@@2@@Z@" ABSL_INTERNAL_MANGLED_BACKREFERENCE \
-    "@@ZEA=?default_factory@cctz_extension@time_internal@" ABSL_INTERNAL_MANGLED_NS                                       \
-    "@@3P6A?AV?$unique_ptr@VZoneInfoSource@cctz@time_internal@" ABSL_INTERNAL_MANGLED_NS                                  \
-    "@@U?$default_delete@VZoneInfoSource@cctz@time_internal@" ABSL_INTERNAL_MANGLED_NS                                    \
-    "@@@std@@@std@@AEBV?$basic_string@DU?$char_traits@D@std@@V?$allocator@D@2@@" ABSL_INTERNAL_MANGLED_BACKREFERENCE      \
-    "@AEBV?$function@$$A6A?AV?$unique_ptr@VZoneInfoSource@cctz@time_internal@" ABSL_INTERNAL_MANGLED_NS                   \
-    "@@U?$default_delete@VZoneInfoSource@cctz@time_internal@" ABSL_INTERNAL_MANGLED_NS                                    \
-    "@@@std@@@std@@AEBV?$basic_string@DU?$char_traits@D@std@@V?$allocator@D@2@@2@@Z@" ABSL_INTERNAL_MANGLED_BACKREFERENCE \
-    "@@ZEA")
+#pragma comment(                                                                                                                  \
+        linker,                                                                                                                   \
+            "/alternatename:?zone_info_source_factory@cctz_extension@time_internal@" ABSL_INTERNAL_MANGLED_NS                     \
+            "@@3P6A?AV?$unique_ptr@VZoneInfoSource@cctz@time_internal@" ABSL_INTERNAL_MANGLED_NS                                  \
+            "@@U?$default_delete@VZoneInfoSource@cctz@time_internal@" ABSL_INTERNAL_MANGLED_NS                                    \
+            "@@@std@@@std@@AEBV?$basic_string@DU?$char_traits@D@std@@V?$allocator@D@2@@" ABSL_INTERNAL_MANGLED_BACKREFERENCE      \
+            "@AEBV?$function@$$A6A?AV?$unique_ptr@VZoneInfoSource@cctz@time_internal@" ABSL_INTERNAL_MANGLED_NS                   \
+            "@@U?$default_delete@VZoneInfoSource@cctz@time_internal@" ABSL_INTERNAL_MANGLED_NS                                    \
+            "@@@std@@@std@@AEBV?$basic_string@DU?$char_traits@D@std@@V?$allocator@D@2@@2@@Z@" ABSL_INTERNAL_MANGLED_BACKREFERENCE \
+            "@@ZEA=?default_factory@cctz_extension@time_internal@" ABSL_INTERNAL_MANGLED_NS                                       \
+            "@@3P6A?AV?$unique_ptr@VZoneInfoSource@cctz@time_internal@" ABSL_INTERNAL_MANGLED_NS                                  \
+            "@@U?$default_delete@VZoneInfoSource@cctz@time_internal@" ABSL_INTERNAL_MANGLED_NS                                    \
+            "@@@std@@@std@@AEBV?$basic_string@DU?$char_traits@D@std@@V?$allocator@D@2@@" ABSL_INTERNAL_MANGLED_BACKREFERENCE      \
+            "@AEBV?$function@$$A6A?AV?$unique_ptr@VZoneInfoSource@cctz@time_internal@" ABSL_INTERNAL_MANGLED_NS                   \
+            "@@U?$default_delete@VZoneInfoSource@cctz@time_internal@" ABSL_INTERNAL_MANGLED_NS                                    \
+            "@@@std@@@std@@AEBV?$basic_string@DU?$char_traits@D@std@@V?$allocator@D@2@@2@@Z@" ABSL_INTERNAL_MANGLED_BACKREFERENCE \
+            "@@ZEA")
 #else
 #error Unsupported MSVC platform
 #endif  // _M_<PLATFORM>
diff --git a/absl/time/internal/cctz/testdata/version b/absl/time/internal/cctz/testdata/version
index 13ad873..5c8fbb4 100644
--- a/absl/time/internal/cctz/testdata/version
+++ b/absl/time/internal/cctz/testdata/version
@@ -1 +1 @@
-2022e
+2022f
diff --git a/absl/time/internal/cctz/testdata/zoneinfo/America/Bahia_Banderas b/absl/time/internal/cctz/testdata/zoneinfo/America/Bahia_Banderas
index 179937f..48faea2 100644
--- a/absl/time/internal/cctz/testdata/zoneinfo/America/Bahia_Banderas
+++ b/absl/time/internal/cctz/testdata/zoneinfo/America/Bahia_Banderas
Binary files differ
diff --git a/absl/time/internal/cctz/testdata/zoneinfo/America/Chihuahua b/absl/time/internal/cctz/testdata/zoneinfo/America/Chihuahua
index b331737..5e0a54f 100644
--- a/absl/time/internal/cctz/testdata/zoneinfo/America/Chihuahua
+++ b/absl/time/internal/cctz/testdata/zoneinfo/America/Chihuahua
Binary files differ
diff --git a/absl/time/internal/cctz/testdata/zoneinfo/America/Mazatlan b/absl/time/internal/cctz/testdata/zoneinfo/America/Mazatlan
index 6b41102..97d4d36 100644
--- a/absl/time/internal/cctz/testdata/zoneinfo/America/Mazatlan
+++ b/absl/time/internal/cctz/testdata/zoneinfo/America/Mazatlan
Binary files differ
diff --git a/absl/time/internal/cctz/testdata/zoneinfo/America/Merida b/absl/time/internal/cctz/testdata/zoneinfo/America/Merida
index d3b0ca1..e5de113 100644
--- a/absl/time/internal/cctz/testdata/zoneinfo/America/Merida
+++ b/absl/time/internal/cctz/testdata/zoneinfo/America/Merida
Binary files differ
diff --git a/absl/time/internal/cctz/testdata/zoneinfo/America/Mexico_City b/absl/time/internal/cctz/testdata/zoneinfo/America/Mexico_City
index 6542c9c..80a415c 100644
--- a/absl/time/internal/cctz/testdata/zoneinfo/America/Mexico_City
+++ b/absl/time/internal/cctz/testdata/zoneinfo/America/Mexico_City
Binary files differ
diff --git a/absl/time/internal/cctz/testdata/zoneinfo/America/Monterrey b/absl/time/internal/cctz/testdata/zoneinfo/America/Monterrey
index dea9e3f..a5822e2 100644
--- a/absl/time/internal/cctz/testdata/zoneinfo/America/Monterrey
+++ b/absl/time/internal/cctz/testdata/zoneinfo/America/Monterrey
Binary files differ
diff --git a/absl/time/internal/cctz/testdata/zoneinfo/America/Nipigon b/absl/time/internal/cctz/testdata/zoneinfo/America/Nipigon
index b9f67a9..fe6be8e 100644
--- a/absl/time/internal/cctz/testdata/zoneinfo/America/Nipigon
+++ b/absl/time/internal/cctz/testdata/zoneinfo/America/Nipigon
Binary files differ
diff --git a/absl/time/internal/cctz/testdata/zoneinfo/America/Ojinaga b/absl/time/internal/cctz/testdata/zoneinfo/America/Ojinaga
index 2ee585c..560b867 100644
--- a/absl/time/internal/cctz/testdata/zoneinfo/America/Ojinaga
+++ b/absl/time/internal/cctz/testdata/zoneinfo/America/Ojinaga
Binary files differ
diff --git a/absl/time/internal/cctz/testdata/zoneinfo/America/Rainy_River b/absl/time/internal/cctz/testdata/zoneinfo/America/Rainy_River
index d6ddda4..7e646d1 100644
--- a/absl/time/internal/cctz/testdata/zoneinfo/America/Rainy_River
+++ b/absl/time/internal/cctz/testdata/zoneinfo/America/Rainy_River
Binary files differ
diff --git a/absl/time/internal/cctz/testdata/zoneinfo/America/Thunder_Bay b/absl/time/internal/cctz/testdata/zoneinfo/America/Thunder_Bay
index fcb0328..fe6be8e 100644
--- a/absl/time/internal/cctz/testdata/zoneinfo/America/Thunder_Bay
+++ b/absl/time/internal/cctz/testdata/zoneinfo/America/Thunder_Bay
Binary files differ
diff --git a/absl/time/internal/cctz/testdata/zoneinfo/Mexico/BajaSur b/absl/time/internal/cctz/testdata/zoneinfo/Mexico/BajaSur
index 6b41102..97d4d36 100644
--- a/absl/time/internal/cctz/testdata/zoneinfo/Mexico/BajaSur
+++ b/absl/time/internal/cctz/testdata/zoneinfo/Mexico/BajaSur
Binary files differ
diff --git a/absl/time/internal/cctz/testdata/zoneinfo/Mexico/General b/absl/time/internal/cctz/testdata/zoneinfo/Mexico/General
index 6542c9c..80a415c 100644
--- a/absl/time/internal/cctz/testdata/zoneinfo/Mexico/General
+++ b/absl/time/internal/cctz/testdata/zoneinfo/Mexico/General
Binary files differ
diff --git a/absl/time/internal/cctz/testdata/zoneinfo/Pacific/Fiji b/absl/time/internal/cctz/testdata/zoneinfo/Pacific/Fiji
index 8b2dd52..610b850 100644
--- a/absl/time/internal/cctz/testdata/zoneinfo/Pacific/Fiji
+++ b/absl/time/internal/cctz/testdata/zoneinfo/Pacific/Fiji
Binary files differ
diff --git a/absl/time/internal/cctz/testdata/zoneinfo/zone1970.tab b/absl/time/internal/cctz/testdata/zoneinfo/zone1970.tab
index cf9cf20..75372e3 100644
--- a/absl/time/internal/cctz/testdata/zoneinfo/zone1970.tab
+++ b/absl/time/internal/cctz/testdata/zoneinfo/zone1970.tab
@@ -102,12 +102,9 @@
 CA	+4606-06447	America/Moncton	Atlantic - New Brunswick
 CA	+5320-06025	America/Goose_Bay	Atlantic - Labrador (most areas)
 CA,BS	+4339-07923	America/Toronto	Eastern - ON, QC (most areas), Bahamas
-CA	+4901-08816	America/Nipigon	Eastern - ON, QC (no DST 1967-73)
-CA	+4823-08915	America/Thunder_Bay	Eastern - ON (Thunder Bay)
 CA	+6344-06828	America/Iqaluit	Eastern - NU (most east areas)
 CA	+6608-06544	America/Pangnirtung	Eastern - NU (Pangnirtung)
 CA	+4953-09709	America/Winnipeg	Central - ON (west); Manitoba
-CA	+4843-09434	America/Rainy_River	Central - ON (Rainy R, Ft Frances)
 CA	+744144-0944945	America/Resolute	Central - NU (Resolute)
 CA	+624900-0920459	America/Rankin_Inlet	Central - NU (central)
 CA	+5024-10439	America/Regina	CST - SK (most areas)