diff --git a/src/time/zoneinfo_abbrs_windows.go b/src/time/zoneinfo_abbrs_windows.go
index 76ee528388..5411325ffe 100644
--- a/src/time/zoneinfo_abbrs_windows.go
+++ b/src/time/zoneinfo_abbrs_windows.go
@@ -16,10 +16,11 @@ var abbrs = map[string]abbr{
 	"Egypt Standard Time":             {"EET", "EET"},     // Africa/Cairo
 	"Morocco Standard Time":           {"WET", "WEST"},    // Africa/Casablanca
 	"South Africa Standard Time":      {"SAST", "SAST"},   // Africa/Johannesburg
+	"Sudan Standard Time":             {"CAT", "CAT"},     // Africa/Khartoum
 	"W. Central Africa Standard Time": {"WAT", "WAT"},     // Africa/Lagos
 	"E. Africa Standard Time":         {"EAT", "EAT"},     // Africa/Nairobi
 	"Libya Standard Time":             {"EET", "EET"},     // Africa/Tripoli
-	"Namibia Standard Time":           {"WAT", "WAST"},    // Africa/Windhoek
+	"Namibia Standard Time":           {"CAT", "CAT"},     // Africa/Windhoek
 	"Aleutian Standard Time":          {"HST", "HDT"},     // America/Adak
 	"Alaskan Standard Time":           {"AKST", "AKDT"},   // America/Anchorage
 	"Tocantins Standard Time":         {"-03", "-03"},     // America/Araguaina
@@ -35,7 +36,7 @@ var abbrs = map[string]abbr{
 	"Central Brazilian Standard Time": {"-04", "-03"},     // America/Cuiaba
 	"Mountain Standard Time":          {"MST", "MDT"},     // America/Denver
 	"Greenland Standard Time":         {"-03", "-02"},     // America/Godthab
-	"Turks And Caicos Standard Time":  {"AST", "AST"},     // America/Grand_Turk
+	"Turks And Caicos Standard Time":  {"AST", "EDT"},     // America/Grand_Turk
 	"Central America Standard Time":   {"CST", "CST"},     // America/Guatemala
 	"Atlantic Standard Time":          {"AST", "ADT"},     // America/Halifax
 	"Cuba Standard Time":              {"CST", "CDT"},     // America/Havana
@@ -130,7 +131,7 @@ var abbrs = map[string]abbr{
 	"Russian Standard Time":           {"MSK", "MSK"},     // Europe/Moscow
 	"Romance Standard Time":           {"CET", "CEST"},    // Europe/Paris
 	"Russia Time Zone 3":              {"+04", "+04"},     // Europe/Samara
-	"Saratov Standard Time":           {"+03", "+04"},     // Europe/Saratov
+	"Saratov Standard Time":           {"+04", "+04"},     // Europe/Saratov
 	"Central European Standard Time":  {"CET", "CEST"},    // Europe/Warsaw
 	"Mauritius Standard Time":         {"+04", "+04"},     // Indian/Mauritius
 	"Samoa Standard Time":             {"+13", "+14"},     // Pacific/Apia
@@ -145,5 +146,5 @@ var abbrs = map[string]abbr{
 	"Marquesas Standard Time":         {"-0930", "-0930"}, // Pacific/Marquesas
 	"Norfolk Standard Time":           {"+11", "+11"},     // Pacific/Norfolk
 	"West Pacific Standard Time":      {"+10", "+10"},     // Pacific/Port_Moresby
-	"Tonga Standard Time":             {"+13", "+14"},     // Pacific/Tongatapu
+	"Tonga Standard Time":             {"+13", "+13"},     // Pacific/Tongatapu
 }