diff --git a/README.md b/README.md
index 9bab9c166..4061d4204 100644
--- a/README.md
+++ b/README.md
@@ -552,7 +552,7 @@ kotlin {
     sourceSets {
         val wasmWasiMain by getting {
             dependencies {
-                implementation("kotlinx-datetime-zoneinfo", "2025b-spi.0.7.1")
+                implementation("kotlinx-datetime-zoneinfo", "2025c-spi.0.7.1")
             }
         }
     }
diff --git a/gradle.properties b/gradle.properties
index 2ae6ed47a..f04009e72 100644
--- a/gradle.properties
+++ b/gradle.properties
@@ -5,7 +5,7 @@ group=org.jetbrains.kotlinx
 version=0.7.1
 versionSuffix=SNAPSHOT
 
-tzdbVersion=2025b
+tzdbVersion=2025c
 
 defaultKotlinVersion=2.1.20
 dokkaVersion=2.0.0
diff --git a/timezones/full/tzdb/America/Ensenada b/timezones/full/tzdb/America/Ensenada
index 51de8b4c6..63aa38a97 100644
Binary files a/timezones/full/tzdb/America/Ensenada and b/timezones/full/tzdb/America/Ensenada differ
diff --git a/timezones/full/tzdb/America/Santa_Isabel b/timezones/full/tzdb/America/Santa_Isabel
index 51de8b4c6..63aa38a97 100644
Binary files a/timezones/full/tzdb/America/Santa_Isabel and b/timezones/full/tzdb/America/Santa_Isabel differ
diff --git a/timezones/full/tzdb/America/Tijuana b/timezones/full/tzdb/America/Tijuana
index 51de8b4c6..63aa38a97 100644
Binary files a/timezones/full/tzdb/America/Tijuana and b/timezones/full/tzdb/America/Tijuana differ
diff --git a/timezones/full/tzdb/Mexico/BajaNorte b/timezones/full/tzdb/Mexico/BajaNorte
index 51de8b4c6..63aa38a97 100644
Binary files a/timezones/full/tzdb/Mexico/BajaNorte and b/timezones/full/tzdb/Mexico/BajaNorte differ