diff --git a/gen-tz.py b/gen-tz.py
index 7404efd..d371003 100755
--- a/gen-tz.py
+++ b/gen-tz.py
@@ -344,7 +344,7 @@
     "Europe/Istanbul",
     "Europe/Jersey",
     "Europe/Kaliningrad",
-    "Europe/Kiev",
+    "Europe/Kyiv",
     "Europe/Kirov",
     "Europe/Lisbon",
     "Europe/Ljubljana",
@@ -381,7 +381,7 @@
     "Europe/Volgograd",
     "Europe/Warsaw",
     "Europe/Zagreb",
-    "Europe/Zaporozhye",
+    "Europe/Zaporizhzhia",
     "Europe/Zurich",
     "Indian/Antananarivo",
     "Indian/Chagos",
diff --git a/zones.csv b/zones.csv
index dd3175d..526faa9 100644
--- a/zones.csv
+++ b/zones.csv
@@ -336,7 +336,7 @@
 "Europe/Istanbul","<+03>-3"
 "Europe/Jersey","GMT0BST,M3.5.0/1,M10.5.0"
 "Europe/Kaliningrad","EET-2"
-"Europe/Kiev","EET-2EEST,M3.5.0/3,M10.5.0/4"
+"Europe/Kyiv","EET-2EEST,M3.5.0/3,M10.5.0/4"
 "Europe/Kirov","MSK-3"
 "Europe/Lisbon","WET0WEST,M3.5.0/1,M10.5.0"
 "Europe/Ljubljana","CET-1CEST,M3.5.0,M10.5.0/3"
@@ -358,7 +358,7 @@
 "Europe/San_Marino","CET-1CEST,M3.5.0,M10.5.0/3"
 "Europe/Sarajevo","CET-1CEST,M3.5.0,M10.5.0/3"
 "Europe/Saratov","<+04>-4"
-"Europe/Simferopol","MSK-3"
+"Europe/Simferopol","EET-2EEST,M3.5.0/3,M10.5.0/4"
 "Europe/Skopje","CET-1CEST,M3.5.0,M10.5.0/3"
 "Europe/Sofia","EET-2EEST,M3.5.0/3,M10.5.0/4"
 "Europe/Stockholm","CET-1CEST,M3.5.0,M10.5.0/3"
@@ -373,7 +373,7 @@
 "Europe/Volgograd","MSK-3"
 "Europe/Warsaw","CET-1CEST,M3.5.0,M10.5.0/3"
 "Europe/Zagreb","CET-1CEST,M3.5.0,M10.5.0/3"
-"Europe/Zaporozhye","EET-2EEST,M3.5.0/3,M10.5.0/4"
+"Europe/Zaporizhzhia","EET-2EEST,M3.5.0/3,M10.5.0/4"
 "Europe/Zurich","CET-1CEST,M3.5.0,M10.5.0/3"
 "Indian/Antananarivo","EAT-3"
 "Indian/Chagos","<+06>-6"
diff --git a/zones.json b/zones.json
index 2d449fe..0f19a2c 100644
--- a/zones.json
+++ b/zones.json
@@ -372,7 +372,7 @@
 "Europe/Istanbul":"<+03>-3",
 "Europe/Jersey":"GMT0BST,M3.5.0/1,M10.5.0",
 "Europe/Kaliningrad":"EET-2",
-"Europe/Kiev":"EET-2EEST,M3.5.0/3,M10.5.0/4",
+"Europe/Kyiv":"EET-2EEST,M3.5.0/3,M10.5.0/4",
 "Europe/Kirov":"MSK-3",
 "Europe/Lisbon":"WET0WEST,M3.5.0/1,M10.5.0",
 "Europe/Ljubljana":"CET-1CEST,M3.5.0,M10.5.0/3",
@@ -394,7 +394,7 @@
 "Europe/San_Marino":"CET-1CEST,M3.5.0,M10.5.0/3",
 "Europe/Sarajevo":"CET-1CEST,M3.5.0,M10.5.0/3",
 "Europe/Saratov":"<+04>-4",
-"Europe/Simferopol":"MSK-3",
+"Europe/Simferopol":"EET-2EEST,M3.5.0/3,M10.5.0/4",
 "Europe/Skopje":"CET-1CEST,M3.5.0,M10.5.0/3",
 "Europe/Sofia":"EET-2EEST,M3.5.0/3,M10.5.0/4",
 "Europe/Stockholm":"CET-1CEST,M3.5.0,M10.5.0/3",
@@ -409,7 +409,7 @@
 "Europe/Volgograd":"MSK-3",
 "Europe/Warsaw":"CET-1CEST,M3.5.0,M10.5.0/3",
 "Europe/Zagreb":"CET-1CEST,M3.5.0,M10.5.0/3",
-"Europe/Zaporozhye":"EET-2EEST,M3.5.0/3,M10.5.0/4",
+"Europe/Zaporizhzhia":"EET-2EEST,M3.5.0/3,M10.5.0/4",
 "Europe/Zurich":"CET-1CEST,M3.5.0,M10.5.0/3",
 "Indian/Antananarivo":"EAT-3",
 "Indian/Chagos":"<+06>-6",
@@ -460,4 +460,4 @@
 "Pacific/Tongatapu":"<+13>-13",
 "Pacific/Wake":"<+12>-12",
 "Pacific/Wallis":"<+12>-12"
-}
\ No newline at end of file
+}