diff --git a/ext/date/lib/timezonemap.h b/ext/date/lib/timezonemap.h
index 21b7998fcf7d..eea97075c910 100644
--- a/ext/date/lib/timezonemap.h
+++ b/ext/date/lib/timezonemap.h
@@ -254,7 +254,7 @@
 	{ "cest",  1,   7200, "Europe/Copenhagen"             },
 	{ "cest",  1,   7200, "Europe/Gibraltar"              },
 	{ "cest",  1,   7200, "Europe/Kaliningrad"            },
-	{ "cest",  1,   7200, "Europe/Kiev"                   },
+	{ "cest",  1,   7200, "Europe/Kyiv"                   },
 	{ "cest",  1,   7200, "Europe/Lisbon"                 },
 	{ "cest",  1,   7200, "Europe/Ljubljana"              },
 	{ "cest",  1,   7200, "Europe/Luxembourg"             },
@@ -306,7 +306,7 @@
 	{ "cet",   0,   3600, "Europe/Copenhagen"             },
 	{ "cet",   0,   3600, "Europe/Gibraltar"              },
 	{ "cet",   0,   3600, "Europe/Kaliningrad"            },
-	{ "cet",   0,   3600, "Europe/Kiev"                   },
+	{ "cet",   0,   3600, "Europe/Kyiv"                   },
 	{ "cet",   0,   3600, "Europe/Lisbon"                 },
 	{ "cet",   0,   3600, "Europe/Ljubljana"              },
 	{ "cet",   0,   3600, "Europe/Luxembourg"             },
@@ -528,7 +528,7 @@
 	{ "eest",  1,  10800, "Europe/Chisinau"               },
 	{ "eest",  1,  10800, "Europe/Istanbul"               },
 	{ "eest",  1,  10800, "Europe/Kaliningrad"            },
-	{ "eest",  1,  10800, "Europe/Kiev"                   },
+	{ "eest",  1,  10800, "Europe/Kyiv"                   },
 	{ "eest",  1,  10800, "Europe/Mariehamn"              },
 	{ "eest",  1,  10800, "Europe/Minsk"                  },
 	{ "eest",  1,  10800, "Europe/Moscow"                 },
@@ -558,7 +558,7 @@
 	{ "eet",   0,   7200, "Europe/Chisinau"               },
 	{ "eet",   0,   7200, "Europe/Istanbul"               },
 	{ "eet",   0,   7200, "Europe/Kaliningrad"            },
-	{ "eet",   0,   7200, "Europe/Kiev"                   },
+	{ "eet",   0,   7200, "Europe/Kyiv"                   },
 	{ "eet",   0,   7200, "Europe/Mariehamn"              },
 	{ "eet",   0,   7200, "Europe/Minsk"                  },
 	{ "eet",   0,   7200, "Europe/Moscow"                 },
@@ -726,7 +726,7 @@
 	{ "kmt",   0,   5736, "Europe/Vilnius"                },
 	{ "kmt",   0, -18430, "America/Grand_Turk"            },
 	{ "kmt",   0, -18430, "America/Jamaica"               },
-	{ "kmt",   0,   7324, "Europe/Kiev"                   },
+	{ "kmt",   0,   7324, "Europe/Kyiv"                   },
 	{ "kst",   0,  30600, "Asia/Seoul"                    },
 	{ "kst",   0,  32400, "Asia/Pyongyang"                },
 	{ "kst",   0,  32400, "Asia/Seoul"                    },
@@ -789,7 +789,7 @@
 	{ "msd",   1,  14400, "Europe/Moscow"                 },
 	{ "msd",   1,  14400, "Europe/Chisinau"               },
 	{ "msd",   1,  14400, "Europe/Kaliningrad"            },
-	{ "msd",   1,  14400, "Europe/Kiev"                   },
+	{ "msd",   1,  14400, "Europe/Kyiv"                   },
 	{ "msd",   1,  14400, "Europe/Minsk"                  },
 	{ "msd",   1,  14400, "Europe/Riga"                   },
 	{ "msd",   1,  14400, "Europe/Simferopol"             },
@@ -802,7 +802,7 @@
 	{ "msk",   0,  14400, "Europe/Moscow"                 },
 	{ "msk",   0,  10800, "Europe/Chisinau"               },
 	{ "msk",   0,  10800, "Europe/Kaliningrad"            },
-	{ "msk",   0,  10800, "Europe/Kiev"                   },
+	{ "msk",   0,  10800, "Europe/Kyiv"                   },
 	{ "msk",   0,  10800, "Europe/Minsk"                  },
 	{ "msk",   0,  10800, "Europe/Riga"                   },
 	{ "msk",   0,  10800, "Europe/Simferopol"             },