diff --git a/src/Dapr/AdminPanel.Host/Dockerfile b/src/Dapr/AdminPanel.Host/Dockerfile
index c5b639231b..29e0d1c2f2 100644
--- a/src/Dapr/AdminPanel.Host/Dockerfile
+++ b/src/Dapr/AdminPanel.Host/Dockerfile
@@ -3,7 +3,8 @@ WORKDIR /app
 
 # OpenMU uses localized texts, which require the culture data of ICU.
 # The alpine images don't contain it and run in the globalization-invariant mode by default.
-RUN apk add --no-cache icu-libs
+# tzdata provides the IANA time zones (e.g. Europe/Berlin), which the alpine images don't contain either.
+RUN apk add --no-cache icu-libs tzdata
 ENV DOTNET_SYSTEM_GLOBALIZATION_INVARIANT=false
 EXPOSE 8080
 
diff --git a/src/Dapr/CentralServer.Host/Dockerfile b/src/Dapr/CentralServer.Host/Dockerfile
index 1f5575480a..bb38108ffe 100644
--- a/src/Dapr/CentralServer.Host/Dockerfile
+++ b/src/Dapr/CentralServer.Host/Dockerfile
@@ -3,7 +3,8 @@ WORKDIR /app
 
 # OpenMU uses localized texts, which require the culture data of ICU.
 # The alpine images don't contain it and run in the globalization-invariant mode by default.
-RUN apk add --no-cache icu-libs
+# tzdata provides the IANA time zones (e.g. Europe/Berlin), which the alpine images don't contain either.
+RUN apk add --no-cache icu-libs tzdata
 ENV DOTNET_SYSTEM_GLOBALIZATION_INVARIANT=false
 EXPOSE 8080
 EXPOSE 44405
diff --git a/src/Dapr/GameServer.Host/Dockerfile b/src/Dapr/GameServer.Host/Dockerfile
index baa9468e9e..63581e6f25 100644
--- a/src/Dapr/GameServer.Host/Dockerfile
+++ b/src/Dapr/GameServer.Host/Dockerfile
@@ -3,7 +3,8 @@ WORKDIR /app
 
 # OpenMU uses localized texts, which require the culture data of ICU.
 # The alpine images don't contain it and run in the globalization-invariant mode by default.
-RUN apk add --no-cache icu-libs
+# tzdata provides the IANA time zones (e.g. Europe/Berlin), which the alpine images don't contain either.
+RUN apk add --no-cache icu-libs tzdata
 ENV DOTNET_SYSTEM_GLOBALIZATION_INVARIANT=false
 EXPOSE 8080
 
diff --git a/src/Startup/Dockerfile b/src/Startup/Dockerfile
index 2f97505258..f58fe76da9 100644
--- a/src/Startup/Dockerfile
+++ b/src/Startup/Dockerfile
@@ -1,7 +1,8 @@
 FROM mcr.microsoft.com/dotnet/aspnet:10.0-alpine AS base
 WORKDIR /app
 
-RUN apk add --no-cache icu-libs
+# tzdata provides the IANA time zones (e.g. America/Argentina/Buenos_Aires) for the server time zone setting.
+RUN apk add --no-cache icu-libs tzdata
 ENV DOTNET_SYSTEM_GLOBALIZATION_INVARIANT=false
 
 EXPOSE 8080