diff --git a/CMakeLists.txt b/CMakeLists.txt
index c2e420d..c3c159d 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -163,6 +163,7 @@ add_definitions(
         -DGIT_HASH="blabla"
         -DDEBUG_HEAP=1
         -DDEBUG_MALLOC=1
+        -D__TIMEZONE__="UTC"
         -DESPFS_HEATSHRINK)
 
 add_executable(ESPTerm ${SOURCE_FILES})
diff --git a/Makefile b/Makefile
index 7c2fc02..a0ecbd3 100644
--- a/Makefile
+++ b/Makefile
@@ -70,6 +70,7 @@ CFLAGS		= -Os -std=gnu99 -Werror -Wpointer-arith -Wundef -Wall -Wl,-EL -fno-inli
 CFLAGS += -DGIT_HASH_BACKEND='"$(shell git rev-parse --short HEAD)"'
 CFLAGS += -DGIT_HASH_FRONTEND='"$(shell cd front-end && git rev-parse --short HEAD)"'
 CFLAGS += -DADMIN_PASSWORD=$(ADMIN_PASSWORD)
+CFLAGS += -D__TIMEZONE__='"$(shell date +%Z)"'
 
 ifdef GLOBAL_CFLAGS
 CFLAGS += $(GLOBAL_CFLAGS)
diff --git a/user/user_main.c b/user/user_main.c
index 5cdb3e0..e56f597 100644
--- a/user/user_main.c
+++ b/user/user_main.c
@@ -99,7 +99,7 @@ void ICACHE_FLASH_ATTR user_init(void)
 	banner_info("Firmware (c) Ondrej Hruska, 2017");
 	banner_info(TERMINAL_GITHUB_REPO);
 	banner_info("");
-	banner_info("Version "FIRMWARE_VERSION", built " __DATE__ " at " __TIME__);
+	banner_info("Version "FIRMWARE_VERSION", built " __DATE__ " at " __TIME__ " " __TIMEZONE__);
 	printf("\r\n");
 
 	ioInit();